I visited the monastery Pechersk Lavra in Kyiv in January 2017
I had to crouch down as we walked through the caves. My guide walking in front of me, I was following with a small candle in my hand for light. My guide would usually walk at a speed fast enough to extinguish my candle if I tried to follow. I would shield the tiny flame with my hand, trying to keep up as best I could. Many other people were exploring the caves as well, a few with guides, most people on their own. I was glad I chose to hire a guide, the information she provided was worth the few Euros I paid many times over.