Krubera Cave is currently the deepest-known cave on Earth, located in the Arabika Massif of the Gagra Range of the Western Caucasus, in the Gagra district of Abkhazia. The Ukrainian Speleological Association expedition reached a depth greater than 6,600-feet, and explored the cave to -6,824-feet. The original name “Krubera” had been assigned to the cave by Georgian speleologists who explored the entrance pit in 1960. This name was given after the noted Russian geographer Alexander Kruber. Continue reading for more fascinating images from around the web.