Joining its cousins the 40,000-gallon pool, the absurdly awesome indoor pool, and the bonkers rooftop pool as an aquatic perk, here's a pool in a Houston residential complex with a crazy, fairly undefined architectural feature protruding from the center. Is it a swim-up bar? An elevated lounge? An HQ for air traffic controllers? $58,900 buys a two-bedroom condo and the chance to figure it out.