Monaco has run out of space for millionaires. It is a playground for the rich. It is famous for its casino and harbor. Over 30 per cent of people there are millionaires. House prices are the highest in the world - around $100,000 per square meter. About 2,700 more millionaires will move there in the next 10 years.

Monaco's Prince Albert II has said OK to a $2.1 billion project to fill in a large area of the sea. There will be a park, a Japanese garden, and 120 luxury homes. Rich people want the luxury lifestyle and no income tax. Experts say the project will kill sea life. The Prince said sea life will live in a new area.