A 21-story green-glass tower soaring above a sea of worn-brick low-rises, the Hotel on Rivington blends into Manhattan's Lower East Side about as well as a spaceship in a cornfield. But what's incongruous outside is pure genius within: Every exterior wall has floor-to-ceiling windows, affording sweeping views—toward the Empire State Building in one direction, the Brooklyn Bridge in the other—from the lobby bar, the beds, and even the showers. The 110 accommodations are perfectly comfortable and come with nifty touches (automated curtains, a maxed-out minibar, and, in some, Japanese soaking tubs), although the decor is so minimalist that it might be mistaken for thriftiness. At press time, the hotel was a work-in-progress—the restaurant hadn't yet opened and slipups were not uncommon. The neighborhood may still be rough around the edges, but hopefully the Hotel on Rivington won't be for much longer.
When to go: Rates are lower in summer, but the city is at its prime in the fall.