The Underground Marvels of Piusa Caves

Piusa Caves is a unique geological site in Estonia, located near the Russian border. The caves were formed over thousands of years by the Piusa River, which gradually eroded the sandstone outcroppings. The caves are notable for their sandstone walls, which are covered in otherworldly mineral deposits, including stalactites and stalagmites. Additionally, the complex system of underground tunnels and caverns creates an eerie and mysterious atmosphere. The Piusa Caves are also notable for their historical significance, having been used as a gunpowder factory during World War II. The caves today are an important protected site, providing a home to various bat species and other wildlife.