What Is a Swimming Pool?

A swimming pool, also known as a bath or wading pool, is a tank or large artificial basin filled with water for recreational swimming and other aquatic activities. They can be built into the ground (in-ground pools) or in a freestanding structure above ground. They can be of a custom size and shape or built to standard sizes, including Olympic-sized pools. In addition to standard swimming lanes, many pools are equipped with diving tanks, splash pads, wave machines, bridges and island bars. They can also be shaped to mimic natural lagoons and other bodies of water. In a residential setting, a swimming pool is often surrounded by lush landscaping to create a private oasis for relaxation and recreation.

Swimming pools have been in use since ancient times, with the first modern indoor pool opening in 1828 in England. The practice of bathing in public and leisurely swimming ebbed and flowed for the next several hundred years until Captain Matthew Webb’s accomplishment of crossing the English Channel in the late 1800s, triggering a major increase in popularity of both swimming and swimming pools.

In recent years, a new style of pool has emerged that is not technically a swimming pool but a spa. This style of pool, sometimes called a negative edge swimming pool or infinity swimming pool, is designed with a notched perimeter to allow water to spill over the edges, creating the optical illusion that the swimming pool extends to the horizon.