There is something new in Piusa now. You can view the cave using a computer.
The cave is called the Piusa Sand Mine. It has been closed since 2006.
The cave is large. The passages are long.
There are pictures of the cave on the computer. The pictures are in 3D.
Photos were used to create the images. Then a 3D model was made.
Many people visit the cave. Some find their names or pictures on the walls.
One visitor, Ljubov, said: "It is interesting." She saw the picture on the screen.
Another visitor, Karolina, said: "It is cool." She is not afraid of bats.