In 1986, a cave was Discovered near Mangalia, Constanța County, Romania, just off the coast of the Black Sea. The oxygen levels are nearly negligent, but due to chemosynthesis, At least forty-eight species of wildlife has been stored away for possible millions of years. Many of these animals are unique to this specific cave.
The cave is unsafe for humans and most animals. It is completely Void of light and contains toxic gasses that the specialized animals within the cave require to live. Less than 100 people have been allowed in the cave, and to get to the entrance you have to be Lowered 65ft into the ground through a narrow passage.
Microbiologist, Rich Boden was one of the first to enter the cave and one of the few to see the lake below, “The pool of warm, sulphidic water stinks of rotting eggs or burnt rubber when you disturb it as hydrogen sulphide is given off.”
The animals that live in Movile Cave are Generally born without eyes or skin pigment, due to the fact that they live in the darkness and don’t need sight or camouflage.
As for humans, if you go in without a special mask it wouldn’t be long before the lack of oxygen and toxic gasses took their toll. It would Begin with labored breathing and a headache, followed by kidney damage…and the rest, well; no one has ever gotten that far.
9 Lake Vostok
Out of over 400 lakes in Antarctica only one can be the largest, and the title goes to Lake Vostok. The lake is at the southern Pole of Cold, beneath Russia's Vostok Station. It resides Far beneath the surface of the central East Antarctic Ice Sheet, which is 11,000ft above sea level. This freshwater lake’s surface is about 13,000ft under the surface of the ice, meaning it would be less than 2000ft below sea level.
The lake has Supposedly been untouched for at least 400,000 years, and it wasn’t until 2012 that scientists completed the longest ever ice core that reached 12,400ft and finally pierced through to the surface of the lake. However, as soon as this happened, Water from the lake gushed up the borehole used to extract the water, and mixed with Freon and kerosene that was used to keep the hole from freezing. In 2015, teams tried again and were successful in retrieving a pure sample. Still, Humans have only touched the surface of this lost world and it is believed that new, unseen creatures could dwell in Lake Vostok. The question is…will humans ever reach them?
8 Son Doong Cave
Son Doong Cave, or known in Vietnam as Hang Sơn Đoòng is a Solutional cave in Phong Nha-Kẻ Bàng National Park, Vietnam. Son Doong Cave is often called the largest cave in the world. It was discovered by a local man named Hồ Khanh in 1991. People from the area knew about the cave, but the steep descent at the entrance as well as the loud sound of the wind and water rushing through the cave, prevented locals from entering. Of course, everyone thought it was spooky! It wasn’t until 2009 that the cave was shared with the world when British Cave Research Association conducted a survey nearby. Unfortunately, their progress was stopped when they ran into a 200 ft calcite wall known as the Great Wall of Vietnam.
In 2013, Some of the largest cave pearls known to man were discovered, some reaching the size of a baseball! Later on, in 2013, the first tourist group explored the cave. The tickets to join this exploration cost a whopping $3,000. Permits are required to access the cave and are given out on a limited basis. Only about 800 are available in 2017 and only through August. During the Fall and Winter months, the water levels are so high that the cave is inaccessible.
7 Sima Humboldt & Sima Martel
Cerro Sarisariñama is a Tepui or flattop mountain range in Jaua-Sarisariñama National Park. Located in Venezuela. The name of the mountain is derived from the tale of Ye'kuana Indians who live near the mountain. They tell a Tale about an evil spirit living in caves up in the mountain and devouring human flesh with a sound "Sari... sari...” (Some sort of windy sound effect?)
On this mountain there are two mysterious sinkholes known as Sima Humboldt & Sima Martel. The larger of the two is Sima Humboldt is over 1000ft deep and over 1000ft wide. The bottom of each hole has its very own individual ecosystem. It was first descended in 1974 and as of today, is exclusive for scientific researchers.