The longest cave in the world, Mammoth Cave in Kentucky, United States, has a length of more than 650 kilometers.
The deepest cave in the world, voro cave in the Caucasus, has a depth of more than 2,200 meters.
The largest cave in the world based on volume, Sarawak Chamber in Malaysia, has an area of around 600,000 square meters.
Some caves have water that contains bacteria and fungi that can produce light, so it looks like the stars in the night sky.
Cave can also be a place for many animals, including bats, blind fish, and insects that are not found elsewhere.
Some caves have unique limestone formations, such as stalactites (stone formations that hang from the ceiling of the cave) and stalagmites (stone formations that grow from the cave floor).
Some caves also have underground rivers that flow through the cave.
Some caves are considered sacred by the local community and are used for religious ceremonies.
Some caves are also popular tourist attractions throughout the world, because of the natural beauty and uniqueness of the stone formation it has.
