Once owned by King Leopold II of Belgium and later by some of the world's wealthiest individuals, Villa Leopolda sits hidden above the French Riviera as the most expensive private estate ever valued on the Côte d'Azur.

Step inside the world’s most extraordinary private libraries, where rare books, priceless manuscripts and spectacular architecture create collections worth more than mansions.

Discover the extraordinary world of luxury crystal, where centuries-old craftsmanship transforms glass into collectible works of art. From Baccarat and Saint-Louis to Lalique, explore the rare pieces, spectacular table settings and crystal creations worth more than a luxury car.

Hidden on Cap Martin near Monaco, Villa Cypris is a remarkable 1904 estate where Byzantine architecture, Mediterranean gardens and Riviera history meet.

A 19th-century fortress rising from Montenegro’s Adriatic coast has been reborn as Mamula Island by Banyan Tree, an extraordinary 32-room luxury escape.

Step inside Chestnut Hall, Atlanta's iconic $46.8 million English Tudor estate, where timeless European architecture, museum-worthy interiors and 18 acres of breathtaking private grounds redefine luxury living.

Hidden in England's picturesque Cotswolds, this $70 million manor combines timeless architecture, luxurious interiors, and breathtaking countryside to create one of Britain's most extraordinary private estates.

It has a concert hall with a baby grand piano, a Turkish bath with gold-plated fittings, a prayer room whose mats rotate automatically to face Mecca, a built-in garage for a diamond-encrusted Rolls-Royce, and a stable for horses and camels.

Step inside Israel's most expensive mansion, a $259 million palace featuring grand architecture, lavish interiors, resort-style amenities, and extraordinary luxury.

Explore three of Montblanc’s most extraordinary creations, from the Taj Mahal edition to the Stella Nova, where fine writing becomes collectible art.