There’s a man-made whirlpool in Singapore that is bound to suck in your attention. The two-level design features a vortex on the top, and a waterfall on the bottom. This huge bowl-like structure is located in Marina Bay Sands, the world’s most expensive standalone casino property, worth nearly $6 billion. The whirlpool only operates during the day, but people say it can be fun at night as well. All you gotta do is whisper into it… or shout.