3Villa Leopolda – Cote d’Azur, France

Estimated Price: $750 Million. Located on the French Riviera, Villa Leopolda is a breathtaking estate known for its stunning views and lush gardens.

Originally owned by King Leopold II of Belgium, this mansion covers over 50 acres of land and features 19 luxurious bedrooms, outdoor kitchens, swimming pools, and even a private beach. Its historical significance and pristine location add to its astronomical value.