The Devetashka cave is located 18 kilometers northeast of Lovech and 2 kilometers of the village of Devetaki. The cave is also known as Maarata or Oknata for its seven different-sized holes in the ceiling, through which sunlight penetrates and illuminates the central hall and part of its two fields. " x7 a2 l- s- m4 \ The undergroud water was great! Due to the high content of lime in the water, that gives its pale blue color。 ) D( f: L1 F/ x# X/ D! K / O0 p, B' ^* y" e8 s( V4 L2 dDevetashka cave位於保加利亞,歐洲最大的洞穴,長約1500m,入口高35m,寬55m,洞中擁有11個美麗的地下湖泊 N& e; ^7 d+ N6 l& a; W