Working 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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