6Les Palais Bulles – Théoule-sur-Mer, France

Value: $390 million.

Les Palais Bulles, or “The Bubble Palace,” is an extraordinary and futuristic home designed by architect Antti Lovag. Located on the cliffs of the Mediterranean Sea near Cannes, France, this unique property resembles a collection of interconnected bubble-like structures. The home has ten suites, all individually designed by contemporary artists. It also boasts an outdoor amphitheater with seating for 500 guests, multiple swimming pools, and stunning views of the Mediterranean. Owned by fashion designer Pierre Cardin, Les Palais Bulles is as much an art piece as it is a home.