Here's a bridge with water above it, or rather, in the bridge itself. This 50-meter long 'swimmable' bridge between two condominium towers in Singapore is luxurious as it is creative. The 38 story-tall Sky Habitat was designed by Israeli-Canadian architect Moshe Safdie and will be completed in 2015.

If heights aren't your thing, then you can swim at another pool located at ground level.