The abyss on a slope of the Iveran Mountain was known for ages, referred to as the "Bottomless Pit". It was explored in 1961 by an expedition of four: Zurab Tintilozov, Arsen Okrojanashvili, Boris Gergedava, and Givi Smyr.
Since 1975 it is a tourist attraction in Georgia, featuring its own underground railway. The cave consists of 9 major cavities.
The cave was discovered by Givi Symru in 1961.
- Voronya Cave in Georgia, the deepest in the world