One Day in Poissy

Begin your morning at the Collegiate Church of Our Lady, the 12th-century sanctuary where King Louis IX was baptized in 1214. From there, step into the Toy Museum housed in a 14th-century priory gatehouse, where 600 toys spanning from ancient clay dolls to early video games trace centuries of childhood play. After lunch, stroll through the shaded paths and rose gardens of Parc Meissonier, a 12-hectare English landscape park on the grounds of a former Dominican monastery, and peek inside the rare all-metal Maison de Fer. End the day at Villa Savoye, Le Corbusier's UNESCO-listed modernist icon, following the famous interior ramp from the pilotis up to a rooftop solarium overlooking the Seine valley. The Toy Museum and Villa Savoye are both closed on Mondays, and the museum is also closed on Tuesdays.