Caves are natural underground spaces formed by various geological processes, such as erosion and volcanic activity. They can vary in size and shape, ranging from small openings to vast networks of tunnels. Caves often contain unique features like stalactites and stalagmites, which are formed by mineral deposits from dripping water. Many caves serve as habitats for diverse wildlife, including bats and insects. They can also hold archaeological significance, preserving ancient artifacts and fossils. Famous caves, like the Lascaux Caves in France, showcase prehistoric art, while others, like Carlsbad Caverns in New Mexico, attract tourists with their stunning formations.