Summer's here, and whether you're by a beach or not, you're looking to do some swimming. We canvassed the world's swimming pools, and we can assure you that there are insanely cool ones everywhere — hotels, mansions, indoors, and beyond. Realize that some of these are proposed pools, so you can't technically swim in them yet, but hopefully soon. Let us know if we missed any in the comments.

Gallery: 30 Cool Swimming Pools From Around The World