site.btaKolkina Doupka Pronounced Bulgaria's New Longest Cave
![Kolkina Doupka Pronounced Bulgaria's New Longest Cave](/upload/674443/20220921_150621.jpg?l=1000)
![Kolkina Doupka Pronounced Bulgaria's New Longest Cave](/upload/674443/20220921_150621.jpg?l=1000&original=4870055d564ca513aac63863fe056fa049560715)
The Kolkina Doupka cave was pronounced the longest cave in Bulgaria with 19,164 m of underground galleries. Until now, the record was held by Douhlata, near the village of Bosnek, on the southwestern slopes of Mount Vitosha near Sofia, with its
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