Measuring a mind-boggling 7,208-feet deep (6.5 Eiffel Towers stacked on top of each other), Krubera, is currently the world's deepest known cave. It's considered the Mount Everest of caves, and located in the Arabika Massif on the edge of the Black Sea in Abkhazia. Ukrainian diver Gennadiy Samokhin extended the cave to its current recorded depth by venturing far down into an area completely subemerged underwater in 2012. Continue reading for more pictures and information.
My Modern Met says, "Photos of expeditions over the years reveal an enormous subterranean wonder that looks like it was taken straight from Journey to the Center of the Earth. With a freezing underground waterfall, entire areas filled with water, and tunnels so narrow it's nearly impossible to squeeze through, the Krubera Cave is an awe-inspiring labyrinth of countless pits and chasms descending deep into the darkness."