You take the fast ferry from Fromentine. Thirty minutes later, you step off somewhere that runs on bicycle time.

Île d'Yeu sits 20 kilometers off the Vendée coast of France. Eight kilometers long, four wide, essentially car-free.

From Port-Joinville's ferry landing, a ten-minute bike ride brings you to Saint-Sauveur village, and to a building that has been six other things before it was the hotel you're about to lounge around in.

A Napoleon III military cantonment. A girls' school. A boys' school. A cinema. A dance studio. A parish hall. On May 1, 2024, it became Hotel La Mission.

Michel Delloye and Jacques-Olivier Larant are childhood friends who spent summers on this island. They went on to found Les Hôteliers Impertinents in Paris, an independent group with a portfolio including Hôtel Monte Cristo, La Belle Ville, and L'Antoine. This one is different. This one is personal.

Architect Émilie Roy preserved what a building can only earn with time: dry stone walls, traditional tilework, classic French white facades, and colorful shutters echoing the island's relaxing yet bright charm. Seven interconnected buildings are arranged around a central garden in a cloister formation, with 4,000 square meters of grounds landscaped by Olivier Riols, a French landscape designer.

The former schoolyard is now a courtyard with a century-old plane tree and a heated outdoor pool.

Pauline d'Hoop, who designed the Sézane boutiques, took the interiors: bold colors, playful prints, and terrazzo bathroom floors layered over white wood panels and powdered ceilings. Each of the 22 rooms has its own color scheme. The five duplex suites have mezzanine king beds, private terrace lounges, and cabin-style children's beds tucked in the corners.

Chef Thomas Gibert and his wife Virginie run La Missionnaire, a restaurant that rewrites its menu daily around the island's coastal catches. Grilled hake, ceviche, tuna steaks.

Bar 1802 is named for the birth year of Alexandre Dumas. It bills itself as France's largest rum bar: 150 varieties, a vintage refurbished counter, free masterclasses every afternoon.

Above it, the rooftop bar La Vigie opens May through October with 360-degree views of Atlantic horizon.

Rates start at €180 a night. A Nuxe Paris spa adds a hammam, Jacuzzi, and indoor pool. The hotel closes in late December and reopens each March 1. Bikes are available to rent on-site: standard, electric, children's, and tandem.

A ferry is the perfect barrier for this place: by the time you arrive at Hotel La Mission, you've already started to slow down.