5Les Palais Bulles – Cannes, France

Estimated Price: $390 Million. Les Palais Bulles, or “The Bubble Palace,” is a unique, futuristic home designed by Hungarian architect Antti Lovag.

Located near Cannes, this property looks like it belongs on another planet, with its round, bubble-like structures. It spans 1,200 square meters and includes 10 luxurious suites, swimming pools, a private amphitheater, and gorgeous panoramic views of the Mediterranean Sea.