Most popular natural monuments BulgariaSliven Province Natural monuments Sliven province Natural monuments Sliven Province mapSee on the map Sliven province natural monuments by popularity rating +SLIVENBulgariaThe Old Elm See natural monuments in other regions Blagoevgrad Province Dobrich Province Kardzhali Province Kyustendil Province Sliven Province Smolyan Province Sofia Varna Province Veliko Tarnovo Province Other categories:MuseumsMonumentsWaterfalls
