Minecraft wiki entry for Cobblestone, associated text: A lava spring flowing onto a river, thus naturally generating cobblestone.
A room mainly made of cobblestone.
A natually generated dungeon made of cobblestone and mossy cobblestone.
Cobblestone and Mossy cobblestone found inside of a jungle temple.
Example of a building made with cobblestone, this one being a church in a village.
Cobblestone and mossy cobblestone as seen in a village and a Pillager outpost from the Java Edition panorama background.
Cobblestone and mossy cobblestone as viewed in a beachside Pillager outpost.
A simple cobblestone farm using lava and water.