Cobblestone is a common block, used for creating various items, that resembles an uneven, roughly paved surface. Cobblestone only occurs naturally in dungeons, NPC Villages, strongholds, or when water and flowing lava come into contact. It is commonly used to create walls for constructions with a medieval appearance such as castles, towers and roads. Cobblestone is obtained by mining stone. Cobblestone is slightly harder to mine than normal stone, and there is an alternative version of the block known as Moss Stone. Silverfish have the ability to enter and hide in cobblestone.