Tranquility Bay Beachfront Resort

Character and identity

Set beachfront in the heart of Marathon, this 103-key resort trades the conventional hotel format for clusters of classic Keys beach houses, with guest rooms tucked inside so arrivals feel more like settling into a private cottage than checking into a corridor. The design language runs coastal and breezy: curvy white wooden headboards, wicker, bright Adirondack chairs on private porches. Three pools, a putting green and stretches of rare Keys sand frame the grounds. TJ's Tiki Bar handles daytime drinks and sunset cocktails, while the Butterfly Café opens for dinner only.

Who's it for

Bottom line

The draw here is geography: a true beachfront footprint in the Keys, which is rarer than the brochures suggest, paired with stand-alone beach-house living rather than hotel corridors. Book it if you value space, sand and a Marathon location over slick interiors or a deep F&B roster. Request a recently refreshed room, and aim for shoulder season to dodge family-holiday rates.