A swimming pool is a tank or large basin filled with water used for recreational or competitive swimming, diving and bathing. It is also used for other water activities such as water exercise, floating on inner tubes or cooling off on hot days. A pool is usually chlorinated to keep levels of germs, algae and insect larvae low. Pumps, mechanical sand filters and chemical disinfectants are used to clean the water in swimming pools.
Swimming pools are often built to be decorative. A freeform pool, for example, may be made to look like a natural lagoon or small oasis. A zero-entry pool, meanwhile, has a gradual edge into the water that gradually gets deeper, mimicking the entry of a natural beach, to help assist older people, young children and people with accessibility issues entering the water.
In the modern era, swimming pools can include luxurious features such as waterfalls, fire features and infinity edges. These are popular with homeowners looking to add a more unique element to their property.
For those not interested in a decorative pool, there are many places to swim, from public beaches and local lakes and rivers to municipal swimming pools. Swimming pools are most common in cities, where they are often open to the public for a nominal entrance fee.
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