Solyanka is a network of subterranean passages built by merchants several centuries ago. Earlier real squatters were living here but there was a fire in the underground that’s why people who were living there were evicted, and the entrance to the subterranean city was welded. But only we know how to get there and to explore the underground world where people were living during several centuries!
We need powerful lanterns, rain boots and respirators to have a full excursion. It will be interesting!