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.

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.

Discover three of Europe's most luxurious castle hotels, where centuries of history, world-class hospitality, and unforgettable experiences redefine luxury travel.

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

A Patek Philippe is no longer simply a watch. A Ferrari 250 GTO is no longer merely a car. And these three Steinway pianos the Alma-Tadema, the Pictures at an Exhibition, and the Fibonacci are no longer simply instruments. They are among the most extraordinary objects ever created, and the stories behind them are unlike anything else in the world of luxury collecting.