These amazing gardens really are a Paris secret. At four-euros admission, they are also one of its biggest bargains. There is a Japanese garden (as well as a “Japanese Village”), a rose garden, a jardin à la française and an English garden. But there’s also a Marais (“swamp”), a Blue Forest, a “winter garden,” a prairie and a mountain forest. All of it was created by banker Albert Kahn (1860–1940), one of 20th-century Europe’s wealthiest men. Khan was notable for his pacifism, his philanthropy and his photos—he funded the world’s first collection of color photography. Along with miles of early film, the museum here has much of it on display. It will astonish you as much as the gardens. Visit before December 21, 2013, when the museum shuts for renovation.
10–14, rue du Port, Boulogne-Billancourt. Within yards of exit from Boulogne-Pont de Saint-Cloud metro stop