There are many caves around the world, but many cave exploration is very difficult due to harsh weather conditions, sharp rocks, scalding water, and slippery environments inside the caves.
Due to extreme conditions, some underwater caves in the world are not even inhabited by marine life. The flooded cenote cave network in the Mexican state of Yucatan is a prime example. In addition, due to unprecedented changes, such as crystal caves and snow caves have now become too dangerous to explore.
The Amazon covers 20,000 square miles and contains half of the Earth's rainforest. Its rich biodiversity and the presence of many rare species make the Amazon rainforest a focus of scientific expeditions. However, due to the mysterious habitat of the Amazon rainforest, it remains one of the least explored places on Earth.
The Amazon rainforest does not have a dry season and it rains all year round. In February, the Amazon rainforest received particularly heavy rainfall, causing the Amazon River to rise sharply and causing severe flooding. In this case, transportation through the Amazon has also become too dangerous due to extreme river conditions.
The Amazon also has other deadliest animals, such as jaguars, rattlesnakes, Brazilian stray spiders, mosquitoes, poison dart frogs, piranhas, black caimans and pythons, which may even threaten human safety. In addition, expeditions in the Amazon rainforest are dangerous because it is difficult to obtain healthy food and clean water.
Antarctica is the coldest place on Earth's surface and the driest, coldest and windiest continent. Under normal circumstances, climate change on the continent ranges between -10 degrees Celsius and -30 degrees Celsius. The lowest temperature recorded in Antarctica was -89 degrees Celsius. This harsh climate makes Antarctica one of the least explored places on Earth.
The fastest wind speed recorded in Antarctica was 1,972 miles per hour, and the ice sheet was 2 miles thick. This reflects extreme climatic conditions that the continent cannot afford. In addition, heavy snowfall, glaciers and fissures are other potential hazards in Antarctica.