A swimming pool or bath is basically a container designed for swimming or water-based fun. Pools come in various sizes and shapes, and some can even be built underground. Generally, pools are made from four main materials: concrete (often called Gunite), metal, plastic, or fiberglass.

This article is here to introduce you to some of the world’s most unique and stunning swimming pools. So, here are four of the most amazing ones:

**Number One – Ubud Hanging Infinity Pools in Bali**
Bali, a small Indonesian island, is famous for its rich culture and breathtaking landscapes. One of its man-made attractions is the Ubud Hanging Gardens Hotel, which features a large multi-level infinity pool. This pool is designed to mirror the nearby hills and gives guests the chance to swim at the edge while enjoying peaceful panoramic views of the ancient Pura Penataran Dalem Segara temple on the opposite hillside. With decks lining the pool, visitors can relax in the sun. The resort itself is built on wooden pillars among rice fields to seamlessly blend the pools into the natural environment.

**Number Two – The Joule Hotel Hanging Pool in Dallas**
For those who love urban spectacles, the Joule Hotel in Dallas offers a rooftop pool that sits eight stories above the ground. This pool extends partly over the edge of the hotel and has Plexiglas sides, allowing you to see the street below through the pool’s water.

**Number Three – Nemo 33 in Belgium**
Located in Brussels, Nemo 33 is the world’s deepest indoor swimming pool. It measures 34.5 meters (113 feet) deep and holds 2.5 million liters of non-chlorinated, filtered spring water, which is kept at a warm 30 degrees Celsius. The pool features numerous underwater windows, giving outside visitors different views of its depths. Designed in 2004 by Belgian diving expert John Beernaerts, it is used for diving lessons, recreational purposes, and film production.

**Number Four – The Underground Pool in Midway, Utah**
For a thrilling and unique experience, dive into this unusual pool hidden away in Midway, Utah. Known as the Homestead Crater, it is a 55-foot high dome filled halfway with spring water, making it a perfect retreat after a cold day in the snow. Discovered in 1886, silver miners initially used ropes to lower themselves from the dome’s top into the water to soothe their tired muscles. Nowadays, visitors enter the pool through a 110-foot tunnel drilled into the dome’s rock wall and enjoy a dip in the crystal-clear water.

These pools show how ordinary swimming pools can be transformed into something extraordinary and magical, ranging from incredible rooftop pools to hidden underground retreats.