一些自然的天窗！(Some natural skylights!)

站在德维塔什卡洞穴的深处，你将在保加利亚令人惊叹的自然礼物之一中经历一段穿越时空的旅程。但这次冒险有一个条件：不要害怕蝙蝠！这些有翼哺乳动物中约有3万只居住在洞穴中。
原文：
Standing deep in the Dvitashka Cave, you will embark on a journey through time and space amidst one of Bulgaria's stunning natural gifts. But this adventure has one condition: don't be afraid of bats! Approximately 30000 of these winged mammals reside in caves.
《© Jasmine_K/Shutterstock》