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Photo Modified: Flickr / Craig Stanfill / CC BY-SA 4.0

The Marina Bay Sands hotel has a 500-foot-long infinity pool! Yes, it is the world’s largest rooftop infinity pool. This pool is available only for guests staying at the hotel. Take the elevator to the 57th floor, find yourself a comfortable lounge chair, and sip on some champagne while admiring the sun as it goes down.