THE GRAND HOTEL MINNEAPOLISWorking out is hard enough at home, so you can forget about keeping fit when you're on the road and the hotel "fitness center" is little more than a windowless room with two rowing machines and a treadmill in disrepair. Thankfully, hotels are stepping it up, and not by just adding a Stairmaster or two; we're talking full-on gyms complete with rock walls, tennis courts, and Olympic-sized pools. Here are five of our favorites.

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