In no special order, and I am British:
Carlsbad Caverns (USA)
Lascaux Cave (France)
Gaping Gill (Great Britain)
Ah, you said 3 famous ones, so I'll stop there! :-)
maoggah
The famous caves in Jordan are called the "Petra" caves, also known as the "Rose City". These caves are ancient and were carved into the rock by the Nabateans. They are a popular tourist attraction known for their unique architecture and historical significance.
Waitomo Caves, noted for their colonies of glow-worms.
The Altamira caves are famous for prehistoric cave paintings.
Probably the most famous are at Lascaux
Carlsbad Cavern.
hab
Crystal caves
Waitomo Caves near Hamilton my friend
toilets
Yes Missouri is famous for its limestone caves.
There are multiple caves in the Blue Mountains, but the more famous and popular one is the Jenolan caves. It is World Heritage listed and there are daily tours inside the cave. It is a very popular tourist attraction.