This is a labyrinth of caves dug into the limestone cliffs. There's a small village and a museum with an exhibition of Stone Age tools and a small cafe where you can relax.
The area needs tourism development to be a really good sight, as you are pretty much on your own and no signs tell you which way to go or what you are looking at.
Arranged tours to the place are made out of Chisinau. I can recommend going on those as I travelled by public transport, which was painstakingly slow and in the end I had to hire a car to get to the place from the main road.