13 Resorts With Incredible 24-Hour Pools

How about an indoor dip? In San Francisco (where the weather's not always pool-friendly anyway), this 50-foot saltwater oasis is open all night long. It's connected to the hotel's Remède Spa, and the minimalist space still boasts 360-degree views of SF, low-slung lounge furniture, comfy pillow-topped window seats, and a poolside menu. Lovely for laps — or just splashing around.