3. Villa Leopolda
Priced at a staggering $750 million, Villa Leopolda is a real-life fairy tale unfolding in the French Riviera. Constructed in 1902 by the king of Belgium as a gift to one of his mistresses, this 14-bedroom villa radiates grandeur and historical intrigue. Despite an almost acquisition by a Russian billionaire in 2008, the deal fell through, leaving Villa Leopolda to stand as an enduring testament to opulence amidst the scenic beauty of the French Riviera.