1. Buckingham Palace (London, UK)

While not officially for sale, estimates value Buckingham Palace, the official residence of the British monarch, at several billion dollars.

2. Villa Leopolda (Villefranche-sur-Mer, France)

This French Riviera estate is valued at around $750 million. It features extensive gardens, a helipad, and stunning views.

3. The Odeon Tower Penthouse (Monaco)

Valued at approximately $400 million, this penthouse is located in the Odeon Tower and offers panoramic views of Monaco.

4. Four Fairfield Pond (The Hamptons, USA):

Priced at around $248 million, this massive estate includes several outbuildings, a power plant, and its power supply.

5. Ellison Estate (Malibu, California, USA):

Owned by Larry Ellison, co-founder of Oracle, this estate is valued at around $200 million and features ten buildings.

6.Villa Les Cèdres (Saint-Jean-Cap-Ferrat, France):

This historic villa is estimated at around $221 million and boasts extensive gardens, a chapel, and a notable botanical park.

7.The Chartwell Estate (Bel Air, USA)

Previously owned by the late Jerry Perenchio, this estate was listed at $195 million and features a French neoclassical-style mansion.

Real estate prices can fluctuate and new properties may have come onto the market since our last update. Additionally, the exact valuations can vary based on market conditions and specific features of the properties.