Golden Horse hill conceals the most extensive cave system in Bohemia, accidentally discovered after a nearby blast in a limestone quarry in 1950.

[2] Spanning two kilometers and three levels, the cave system inside the Zlatý kůň hill consists of passages and domed chambers interconnected by shafts developed in limestone of the Devonian age.

The caves were formed by a small stream at the end of the Tertiary period, as well as rainfall that seeped through cracks in the limestone, resulting in rich speleothem formations from an abundance of stalagmites and stalactites as well as little sinter lakes.

The most beautiful area is deemed by experts to be the extensive Prošek chamber with its sinter Jezírko lásky (Little lake of love).

They were formed by calcium carbonate dissolved in water, which then gradually precipitated on the walls of the underground lake in the shape of bushes, the tips of which later fell away to create an unusual formation reminiscent of rose blooms.