1/13 Marina Bay Sands Skypark, Singapore

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Though it's definitely not for those with vertigo, the infinity rooftop pool at the Marina Bay Sands Skypark in Singapore gives guests the opportunity to take a swim on top of the world. This 1115-foot-long pool may be the most impressive on earth. It's 57 floors up, embracing three buildings and appearing as if the water spills over the edge. 

In reality, the water is actually pumped back into the building's magnificent pool. Stunning day or night, as it's open until 11 p.m., taking a dip after dark is a must.