Small cave of about 200 meters with five halls of onyx, stalactites and stalagmites lit by colored LED lights. Guided groups enter on the hour, with helmets, along metal platforms through narrow, low passages.
Highlights
- Onyx formations
- Colored LED lighting
- Five halls on platforms
Good to know
- Groups often booked out, call ahead
- Around 10°C year-round
- Tickets cash only, tours in Bulgarian
