The Rhodope cave Dobrostanski  Biser located near the town of Asenovgrad has attracted large number of tourists this summer. Tourist queue outside before entering the cave which abounds with beautiful rock formations. That is why the local authorities decided to change the working time. The tourist site will be open between 9 am and 6 pm until the end of the summer tourist season. Visitors must comply with all anti-epidemic measures in the cave, the managers warn.

Dobrostanski Biser is a relatively small cave- it covers an area between 500 and 1,000 square meters. However, tourists can see all three forms of karst formations inside-stalactites, stalagmites and stalactones. The small cave ponds are the biggest attraction. They are arranged like a cascade- one below the other and each pond fills the next one with water. The water is co clear and transparent that one can think that the ponds are empty.

The cave is named after the beautiful rock pearls that were formed over the centuries in its lakes. A small bat colony lives in the cave. These animal species play a key role for preserving the eco-balance in the area.