Ha Long Bay in Vietnam has thousands of rocky islands in the sea.
The tall green islands rise straight out of the water. Boats sail slowly between them past hidden caves.
More facts about Landmarks
A landmark is a famous place that people love to visit.
The Eiffel Tower is a tall iron tower in Paris, France.
The Statue of Liberty in America holds up a torch.
The Great Wall of China is a very long wall built long ago.
The Great Wall of China is so long it would stretch halfway around the world.