In our modern age of satellite images and airplanes, exploring and mapping new places is incredibly easy. In the past, however, the task fell to small expeditions of well-equipped people. These groups often relied on nothing but their protocol, a few rations, and a handful of mapping tools, spending months, if not years, crossing new boundaries and recording what they found. These trips were extremely dangerous and many ended in disaster.
Some, however, suffered an even stranger fate: they disappeared completely from the ground. Some have since been discovered – often centuries later – but others are missing. For example, the mysterious disappearance of Percy Fawcett has led to the death of up to 1
10 Madoc  Several centuries before Columbus sailed to America, a Welsh prince named Madoc left Wales with ten ships and the dream of discovering a new land. Madoc was the son of King Owain Gwynedd, who had 18 other sons, some of them bastards. Madoc was one of the bastards. When King Owain died in 1169, a civil war broke out between the brothers, who were to be the next king. Madoc, a peaceful man, gathered a group of other peace lovers and set out to find new countries. According to legend, he returned in 1171 with stories of his adventures and attracted more people to go with him on a second expedition, from which he never returned. 
The story that existed Some people believe that Madoc and his men have landed near today's Mobile, Alabama. In particular, stone fortresses along the Alabama River have attracted attention since they were built before Columbus's arrival, but some Cherokee tribes say they were built by "white people" the Mandan Indians. Several rumors about this myth, such as the alleged similarity between the Mandan language and Welsh. Governor John Sevier of Tennessee wrote in 1799 a report on the discovery of six skeletons in brass armor with the Welsh coat of arms, which was possibly a joke. If they were real, they would be the most reliable proof of the potential fate of Madoc's expedition, which otherwise remains a mystery.
9 Vivaldi Expedition
It is now a known fact that Columbus was not looking for America when he left Spain; He expected to find Asia. And two centuries earlier, in 1291, this was also the goal of the Vivaldi Expedition. From Genoa, the two brothers Vandino and Ugolino Vivaldi wanted to reach with their supporters through the southern tip of Africa to India. They equipped their expedition with enough food for ten years of travel, so they clearly expected to be gone for a long time. They passed the Strait of Gibraltar in mid-1291 and were never seen again. 
There have been several attempts to discover the fate of the expedition, first led by Lancelotto Malocello in 1312. He traveled as far as the Canary Islands, where he built a fortress and stayed for over two decades without seeing a trace of the lost brothers. Sometime in the early 13th century Ugolinos son Sorleone went in search of his missing father and uncle. According to some sources, he may have made it to Mogadishu, but he found no trace of them either.
Another mention of the expedition appears in 1455, when researcher Antoniotto Uso Di Mare announced that he had met a descendant of a survivor who had traveled with the brothers. According to him, the brothers made it to Senegal, where they were kept prisoner for the rest of their lives.
8 Abubakari Expedition
The expedition of Abu Bakr II (also known as Mansa Qu), ruler of the Malian Empire, is surrounded by controversy. The best proof of this is the Arab historian Shihab al-Umari, who met Cairo's Mansa Musa, Abu Bakr's heirs, at the beginning of the 13th century. 
According to Mansa Musa, his father refused to believe that the ocean has no end, and equipped an expedition of 200 ships with seamen, food and gold to find his edge , Only one ship returned. According to the ship's captain, they saw a thundering waterfall in the middle of the ocean, which seemed to be the edge. His ship was in the back of the fleet. The rest of the ships were sucked in and he could only row backwards. The king refused to believe him and equipped 3,000 ships to try again to travel with them this time. He made Mansa Musa regent in his place, but never returned.
Several historians have suggested that Abu Bakr's expedition came to America, supported by a legend of the native Taino of Hispaniola about blacks who came before Columbus with weapons from a Taino gold-bearing alloy. Others, however, rejected the allegations and said that no archaeological evidence for such a connection had ever been found. One thing is sure: Abu Bakr never returned to reclaim his kingdom.
7 Cabot's last expedition
John Cabot is now the first European to be known since the time of the Vikings, who discovered North America. Cabot's historic journey most likely landed in June 1497 in Bonavista, Newfoundland. In a manner very similar to the moon landing, the crew left the ship for a short time to set up the papal banner and claim the land for England before returning to their ship and spend the next few days doing so. to explore the coast from the water. When they returned to England, Cabot was celebrated as a hero and received £ 10 as a reward – the value of about two years' pay for an average worker – and a pension of £ 20 a year. 
Despite his fame, the fate of John Cabot remains unknown to this day. From contemporary sources, we know that Cabot undertook a second expedition to the New World, which consisted of five ships. They left Bristol in May 1498 with a cargo consisting mainly of merchandise. The last mention of Cabot and his men came two months later from the Spanish ambassador in London, who reported that the fleet was involved in a storm and that a ship had to stop in Ireland. The rest of the fleet went on.
He may never have returned, as there are no other records of John Cabot, not even to say he was missing. Some speculate that he returned to England and lived there a few years later. The exploration of his final destiny is not yet completed, but the latter theory is supported at least by the fact that one of the men who were to accompany him on his last journey, Lancelot Thirkell, lived in London in 1501.
6 Franklin's Lost Expedition
In 1845, British explorer Sir John Franklin set off with a small team to navigate the last unmapped part of the Northwest Passage. With the HMS Erebus and the aptly named HMS Terror they left England in May. Her fates were unknown until 2014. 
The loss led to a flood of activity in the UK, both in the public and in the government. The Admiralty organized in 1848 three search teams, one on land and two on the water, which remained unsuccessful. Repeated attempts to find them were continued until the final search team was launched in public support in 1857. (At that time, the government had declared the entire team dead.) Talking to the local Inuit, some of whom had items that had been heard For the crew, they learned that the ships were trapped in the ice. Franklin himself died in 1847. The remainder of the crew left the ships and began a desperate hike back to civilization on the Canadian mainland after wintering on King William Island, leading to the death of all involved. After analyzing a few bones, the crew seems to have resorted to cannibalism.
The truth, however, was not known until Canadian researchers rediscovered the HMS Terror in 2014 in near-perfect condition – indeed so large that it would probably still be swimming if the water were drained from it. The find indicates that the ship was properly abandoned. The crew most likely moved to the HMS Erebus where they vainly tried to sail out of the icy water before finally being caught again. After that, they were forced to continue on foot.
5 Eudoxus of Cyzicus
The ancient world was more closely connected than we often observe. Even before the rise of the Roman Empire, the ancient Greeks traded with India. While seamen from both countries could not make it, they often met in commercial ports along the Yemen coast, where the Greeks exchanged flavors and other luxury goods to bring them home.
118 BC Indian sailor was shipwrecked in the Red Sea and taken to the court of Ptolemy, the Greek ruler of Egypt. With the help of the sailor, a Greek explorer, Eudoxus of Cyzicus, undertook the first recorded voyage to sail directly from Egypt to India.  He undertook the journey 116 v. Chr. Again, this time without Indian help. This was important in the history of trade across the Indian Ocean: within a few decades, maritime trade between Greece and Rome and ancient India had increased significantly.
During this second voyage he was blown off course and finally sailed on the African coast. There he came across a shipwreck, which he regarded as coming from Spain due to local stories and ship design. He thought it must have traveled around the southern tip of Africa. Always the adventurer, he decided to try the same journey. After driving overland to Spain, his first attempt failed after he got into trouble on the Moroccan coast and had to return. Shortly thereafter, he tried again and never came back. It was the first attempt to circumnavigate Africa, a feat that has not been repeated for more than 1,000 years.
4 Peter Tessem and Paul Knutsen
In 1919, the Norwegian explorer Roald Amundsen undertook a journey along the north coast of Russia as part of an expedition, when one of his crewmembers, Peter Tessem, suffered from a chronic headache. As a result, he remained with another explorer, Paul Knutsen, on Cape Chelyuskin, who had previously traveled the area.  Roald was confident that they would make it to the nearby town of Dikson, which was just over a month's drive away. Paul Knutsen knew the location of the supply caches that had been left in the area so they should not pose a threat.
In 1920, however, the two men still had not arrived in Dikson. The Norwegian government organized a search party shortly thereafter, but found nothing. The Soviets launched their own search in 1921, in which a Norwegian sledge and a letter of the men were found, in which they were in good health, but otherwise found nothing The men had been entrusted in 1922. Some time later, they found the body of one of the men. Although they could not identify it, it bore a gold watch with the name of Tessem. The body was found within sight of Dikson. They buried it further up the slope. Today the site is characterized by a granite monument with the name Tessems.
3 The Corte-Real brothers
Gaspar Corte-Real belonged to a family Portuguese explorer: his father had discovered what was most likely North America in 1473, and when Gaspar was old enough to sailing, he joined his brothers and became an adventurer.
In 1500, the Portuguese King Manuel Gaspar sent an expedition to find the Northwest Passage to Asia. North America was largely unknown at the time, and when Gaspar came across Greenland, he mistook it for Asia.  Returning without landing, he assembled a larger crew for the journey. This time he brought along two more ships and his older brother Miguel. They made their way to Greenland, but were hampered by ice on the water and had to turn south, where they most likely landed in Newfoundland. They captured 57 natives and planned to sell them as slaves. Gaspar sent Miguel back with two of the ships to bring their prisoners back to Portugal and drove south alone. He never returned.
A year later, Miguel returned to Newfoundland to find his brother, but he also disappeared. However, due to its success, the Portuguese government became very interested in North America and financed several other expeditions to the seas around Newfoundland, before eventually being driven out by French and English settlers.
2 George Bass
George Bass was a surgeon and navigator who played an important role in the mapping of the Australian coast. Between 1795 and 1798 he traveled aboard the HMS Reliance studying and making records of plants and animals in Australia, confirming the occurrence of coal in Sydney and identifying the straits between New South Wales and Tasmania later named after him. His many achievements meant that in 1799 he was elected a member of the Linnean Society of London, the oldest natural history society in the world. 
Despite his scientific achievements, Bass eventually became his merchant shipping business. In 1803 he planned an expedition from Australia to South America. In his last surviving letters he referred to a company he could not name: it is likely that he intended smuggling, since Britain and Spain (and Spanish South America in a broader sense) did not have the best conditions at the time. He left Australia in February 1803 and was never seen again. Speculation that he was captured by the Spanish authorities was exposed because his name did not appear in Spanish or Peruvian records, and when Spain dismissed all his British prisoners a few years later, he was not included. His fate is still unknown.
1 USS Sea Gull
In August 1839, the US Navy purchased a former New York pilot boat and renamed it Sea Gull . 19659044] In addition to the newly acquired Flying Fish he was to be part of the mission of the US Exploring Expedition to map the Antarctic and the Pacific. However, the plan suffered a severe setback when they reached the southern tip of South America: Cape Horn. In the face of strong winds, troubled waters and snow, the expedition waited for months before moving on in April 1840. The Flying Fish and Seagull were left to wait for the ship to resupply. Once they had the supplies, they would catch up with the rest of the fleet.
But the winds were still dangerously high. On the night of April 28, the winds were particularly dangerous, and the flying fish and their crew made their way back to the harbor, where they awaited the storm that followed. They last saw the Seagull at midnight, but they never followed them back to the harbor. It was never seen again. The USS Sea Gull is still on the list of the US Naval Institute "Missing and Presumed Lost".