Villa Les Cèdres, nestled in the heart of French Riviera, claims the title for the most expensive property on Billionaires Row. This opulent mansion once owned by King Leopold II flaunts its 187-year history, 14 extravagant bedrooms, and sprawling gardens adorned with ancient olive trees. Valued at a jaw-dropping $450 million, it captivates billionaires worldwide with its unmatched grandeur and luxurious charm.