This luxurious 17th-century French palace is a masterclass in excess. It has hundreds of acres of magnificently landscaped gardens, more than 2,300 rooms, a large collection of French Renaissance art, an opera house, and a 75-meter-long hall of mirrors lined with priceless statues and busts. There are no half-measures in its conception or execution – it even has more than 1,200 fireplaces! It's one of the most visited attractions in France, as well as a UNESCO World Heritage Site. Take your pick