The cave, formed in Lower Cretaceous limestones, has two entrances. The first — from which the main underground stream issues — is 3.5–4 m high and 7 m wide; the left branch reaches the surface by steep steps 35–40 m from the main entrance. Sixty meters further, the floor is occupied by a siphon lake 50 m long, 3–4 m wide, with the ceiling up to 2.5 m. The first siphon is continued by a water-filled, shoreless corridor 200 m long, where the water is 0.5–2 m deep. The water corridor is followed by another siphon gallery, 30 m long and 1–2 m wide, which passes in turn into a 150-m gallery whose ceiling is covered with dripstone forms almost throughout. This water gallery develops several more siphon passages to the cave's end, where over the last 20–30 m movement becomes very difficult because of the lowering ceiling. The underground stream of Ghliana yields 50–55 l/s (at low water); after leaving the cave this stream joins the vauclusian springs of the Kumi River. In the cave's dry corridors dwells a numerous colony of bats.