Château de Chambord
Lonely Planet review
The Loire Valley was the playground of French nobility, who used the nation's wealth to transform the area with many earnestly extravagant chateaux. The largest and most lavish is the Château de Chambord (1519). It was built by King François I, a rapacious lunatic who was fanatically dishonest with his subjects' money.
Begun in 1519, its Renaissance flourishes may have been inspired by Leonardo da Vinci, who lived nearby from 1516 until his death three years later. Construction of the chateau, during which François unsuccessfully suggested the rerouting of the Loire River so it would be nearer to his new abode, took 15 years and several thousand workers, although the king died wizened and drooly before the building's completion.
Inside is a famed double-helix staircase that buxom mistresses and priapic princes chased each other up and down, when not assembled on the rooftop terrace to watch military exercises, tournaments and hounds and hunters returning from a day's deerstalking. From the terrace you can see the towers, cupolas, chimneys, mosaic slate roofs and lightning rods that comprise the chateau's imposing skyline.