Ozernaya Cave
Cave Blue Lakes
Ukraine, Borschiv
Cave Ozernaya or Blue Lakes (total length - 117 km), known since 1940. The maximum height of the passages reaches 18 m, the maximum width is 20 m. This is a single cave of the Ternopil region with underground lakes (more than 20 lakes were found), the entrance to it looks like a funnel-abyss with a diameter of 235 meters and a depth of 13 meters. Here, a constant temperature of +100C is observed throughout the year, relative humidity fluctuates between 92-100%. The system of cave passages forms two large formations - the Near and Far Regions. Groups of experienced tourists are allowed in the Near region, and the Far region is closed for excursions by amateur speleologists through difficult terrain.