Trovants are the stones that grow by themselves.
Romania is known for this natural stones which quite literally grow by themselves. these stones are known as Trovants.
they have a strong stone core but their shells are made of sand. Scientifically these giant stones are sandstone concretions and the weird forms are achieved by these stones is an irregular secretion of cement. but Geologists argue that these stones are the result of a cementation process that occurred millions of years ago in this region .
In year 2006 a museum (Muzeul Trovantilor)was built in Costesti, a village in the Valcea to host some of these remarkable pieces. Within the walls and outside of this museum, visitors can see these stones in different shapes and sizes.