10 Most Expensive Houses 5. Palais Bulles — Théoule-sur-Mer, France by Ghani Khan Estimated Value: $280–$370 Million Palais Bulles, or the Palace of Bubbles, stands as a dramatic expression of creativity, artistry, and pure opulence along the French Riviera in Théoule-sur-Mer, France. Designed by Hungarian-born Antti Lovag and constructed from 1975 to 1989, this remarkable residence disregards conventional lines and forms in favor of organic, spherical spaces that blend harmoniously with their Mediterranean setting.