Koněprusy Caves - Credit: Wikimedia Commons
Koněprusy Caves (), also Zlatý kůň (Golden Horse), is a cave system in the heart of the limestone region known as Bohemian Karst in the Central Bohemian Region of the Czech Republic. It is located in the municipality of Koněprusy, about southwest of Prague, south of Beroun. With the length of and vertical range of , it is the largest cave system in Bohemia.Petr David, Vladimír Soukup, Lubomír Čech, Wonders of Bohemia, Moravia and Silesia, pg. 20-21, Euromedia Group (2004), Read more on Wikipedia
Source: en.wikipedia.org