8. The Joule – Dallas, USA
Suspended off the edge of a downtown Dallas high-rise, this cantilevered rooftop pool isn’t massive in scale, but it’s massive in wow-factor. Part of it juts out beyond the building with a glass wall, giving swimmers a surreal view of the city below. It’s a gravity-defying urban oasis that redefines what a pool can be. Bold, daring, and very Texas.