The hook
A river valley packed with the pleasure-palaces French kings and nobles built when a castle stopped being a fortress and became a statement, including one with a double-helix staircase said to owe something to Leonardo.
01Why it's worth it
In the Renaissance the French court moved to the Loire, and the aristocracy competed to build along it, so the valley now holds a run of extravagant châteaux within a short drive of each other. Chambord is the giant: four hundred-odd rooms, a wildly ornamented roofline, and a famous double-helix staircase whose two spirals never meet, its design often linked to Leonardo da Vinci, who spent his last years nearby as a guest of the king. Chenonceau is the graceful one, arched right across the river Cher and run for generations by a series of formidable women. Others, Villandry for its geometric gardens, Amboise for Leonardo's tomb, fill out a valley you can spend days in. It can be a lot of grand rooms, so pick a few and go deep rather than ticking off ten.
02How to experience it
Choose two or three rather than a marathon. Chambord for scale and the staircase, Chenonceau for the river setting, Villandry if you love gardens. The valley is flat and threaded with cycle paths, so biking between a couple of châteaux is a fine way to break up the interiors.
From the locals
The Loire is the part of France people who lived there send you to, and they add the detail that makes it: "I'm a big fan of Tours and the many beautiful châteaux in the Loire Valley — faves include Chenonceau, Chambord, Blois, and Amboise." Two tips recur. At Amboise, "take a look at the Clos Lucé," Leonardo da Vinci's last residence. And take a bike: "along the Loire river, many routes are totally doable with a bike — highly recommend," with troglodyte cave-houses cut into the valley walls along the way.