Known in Romania as “Trovants” the stones of Costesti, Romania are a type of sandstone concretion that secrete cement and can at times appear to grow as if alive.

Consisting of a stone core with an outer shell of sand, after a heavy rain small forms are said to appear on the rocks leading them to be dubbed the “growing stones” by locals.

The “Muzeul Trovantilor” or “Trovants Museum Natural Reserve “ was created in 2004 to protect the unusual geological creations.