Pierre Cardin, creator of the famous Bubble Dress in 1958, purchased this home, known as Le Palais Bulles in the early 1990s and now it’s listed for around $456 million, and it’s Europe’s most expensive home. The house is made up of many bubbles and is located on a cliff over the Mediterranean, it comes with a garden, swimming pool, and a 500-seat, open-air auditorium.