natural wonder - Finland

amusements animals castle city forest height lake natural wonder observation deck reserve resort river sculptures sea street-art waterfall winter sports zoo

Finland has the deepest karst failure in Europe with a depth of 23 meters, called the Devil's Nest. It's creation took more than 1 million years and went through 4 ice ages. Glaciers moved the rock and filled the hole with granite, sand and other materials. All this was cleared at the end of the 20th century and the failure opened to visitors read more...