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In page Slovenia:

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Four natural and cultural sites in Slovenia are on the UNESCO World Heritage Site list. Škocjan Caves and its karst landscape are a protected site[2] as the old forests in the area of Goteniški Snežnik and Kočevski Rog in the SE Slovenia. The Idrija Mercury mining site is of world importance, as are the prehistoric pile dwellings in the Ljubljana Marsh.[3][citation needed]