Caves, Information and Facts | National Geographic
Cave | Definition, Formation, Types, & Facts | Britannica
Caves: Information + Facts - Science4Fun
Stalactites, Stalagmites, and Cave Formations - Mammoth Cave National Park (U.S. National Park Service)
Cave | Definition, Formation, Types, & Facts | Britannica
Virtual Cave-Solutional Caves
Geology of India - A cave or cavern is a natural void in the ground,specifically a space large enough for a human to enter. Caves often form by the weathering of rock