7. The Library Pool – Koh Samui, Thailand
This bold and artistic pool may not be huge in size, but it makes a massive visual statement. Lined with bright red, orange, and yellow mosaic tiles, the water takes on a deep crimson hue that turns heads instantly. Set just steps from the Gulf of Thailand, it’s as much a design masterpiece as it is a place to relax. Stylish, striking, and unforgettable.