
The Onyx Gallery
10 minsOnyx formations
This hall contains semi-precious onyx formations that glow under colored LED lights. Look closely to see the translucent quality of the stones. You will spend about 10 minutes observing this area.

Explore
Discover five distinct halls filled with illuminated onyx and calcite formations.
Venetsa Cave contains 200 meters of accessible tourist routes winding through five main chambers. A colorful LED lighting system illuminates the semi-precious onyx and crystal structures.
You will explore these deep underground halls during your 40 to 50-minute guided tour. The temperature remains at a constant 10°C year-round.

10 minsOnyx formations
This hall contains semi-precious onyx formations that glow under colored LED lights. Look closely to see the translucent quality of the stones. You will spend about 10 minutes observing this area.

5 minsWatch light cycles
This is the cave's most famous natural sculpture. It closely resembles the silhouette of the Virgin Mary. Wait for the LED light cycle to change so you can see the formation in different colors.

10 minsUse low-light modes
This chamber features delicate, flower-like calcite crystals. These formations developed because of a unique lack of oxygen in the water. Bring a phone or camera with good low-light capabilities to capture them clearly.

10 minsHelmets mandatory
Tight, low-ceiling corridors connect the five main halls. You will need to duck and squeeze through these sections. Watch your head and rely on the mandatory safety helmet provided at the entrance.
