Granite is a very hard, sparkly rock that usually forms deep underground when hot melted rock cools down slowly. The boulders of Seychelles were made this way around 750 million years ago - long before there were any animals on land, never mind dinosaurs. They are some of the oldest rocks you can ever stand on at the seaside.
For hundreds of millions of years, rain, wind and waves have slowly polished these boulders smooth. The corners have been rubbed off. Now they sit like sleeping giants on the beach, often with a small bushy tree growing out of the top.
The most famous beach for boulders is called Anse Source d'Argent on La Digue. It looks so unusual that it is often called one of the most beautiful beaches in the world. Tourists from many countries come just to see the way the boulders meet the white sand and the turquoise sea.
Children growing up in Seychelles climb on the boulders, jump off them, and find hiding spots between them. They warm up in the morning sun, so by lunchtime they are toasty against your back. A boulder makes a brilliant lookout point for spotting fish in the shallow water below.