Fascinating Guinness World Records for Swimming, Pools

As with any Guinness World Record, don't ask why. The answer is always going to be because. Because it's there. Because you, he, she, they, or we can. It's part of human nature, spirit, competition, and, frankly, the reason the Guinness World Record exists. It's also a not-so-subtle PR method, a way of getting your name, company or brand on the map.

To satisfy those burning questions:

Where is the world's largest swimming pool? How many people wore swim caps together at one time, and what was the largest number of people to perform a synchronized swimming performance? Who knows? Maybe these will give you the inspiration to break some other as-yet-unbroken record.

  • 01 of 11

    World's Largest Swimming Pool

    Overhead view of the world's largest pool.
    San Alfonso del Mar

    Where: Algarrobo, Chile

    Size: 62 miles (100 kilometers)

    When: After it was built in 2006

    While Olympic-size swimming pools are definitely big, the world's "Largest Swimming Pool by Area" honors goes to a large, water sports and activity-oriented seaside resort in Chile. Its freshwater lagoon, built by the international firm Crystal Waters, entertains water- and sun-loving guests at the San Alfonso del Mar year-round. This picture may explain part of the appeal, if you happen to like really big pools.

  • 02 of 11

    Deepest Pool for Diving

    When: June 5, 2014
    What: The Y-40 diving pool
    Where: Montegrotto Terme, Italy

    Size: The pool has a depth of almost 138 feet (42 meters) at its deepest point. It contains approximately 1,135,939 U.S. gallons (4.3 million liters) of thermal water.

    Details: Designed by Emanuele Boaretto, the Y-40 and is used for is used for dive training, leisure diving, and scientific research.

    The pool is 21 m (68 ft 10.77 in) long and 18 m (59 ft 0.66 in) wide and features various intermediate depths, four caves for underwater diving.

  • 03 of 11

    Largest Inflatable Pool Toy

    When: Reported June 5, 2017
    Where: Hermosa Beach, California

    Details: As a promotion, AT&T and IHeart Radio teamed up to create the world's largest inflatable pool toy at a Southern California beach. After making her debut, Sally the Swan, a 54-foot-tall blue inflatable swan, was shipped to Florida, where she appeared at an IHeart Radio weekend event.

  • 04 of 11

    Most People to Swim One Length in a 24-Hour Relay

    When: June 11-12, 2010
    What: Most people swimming one length in a 24-hour relay
    Where: Padovanuoto, Padua (Padova), Italy
    Cause: Swim For Children
    Youngest Participant: 4 years old
    Oldest Participant: 81 years old

    The most participants to swim one length each during a 24-hour relay is 5,028 and was set by Swim For Children in Italy. More than 50,000 EUR ($61,000) was raised for the Paediatric Research Institute "Citt della Speranza". Participants covered a distance of more than 92 km (57 mi).

    Continue to 5 of 11 below.
  • 05 of 11

    Longest Duration Juggling Three Objects Underwater

    When: April 1, 2012
    Where: Reute, Germany

    Juggling sensation Nikolay Linder of Germany scored the title of "Longest Underwater Juggling of Three Objects" in just 2 minutes and 48 seconds. He beat a previous record of one hour and 30 minutes accomplished a year earlier by Zdeněk Bradáč of Czechia. The difference? Linder did not wear scuba gear.

  • 06 of 11

    Largest Skinny Dipping, Multiple Venues

    When: July 11, 2008
    Where: Throughout the United States
    Number of Participants: 13,674

    The largest skinny dipping event involved 13,674 Participants, organized by the American Association for Nude Recreation (AANR) at 103 club resorts in July 2008.

  • 07 of 11

    Largest Skinny Dipping

    When: June 9, 2018
    Where: Wicklow, Ireland
    Number of Skinny Dippers: 2,505

    The awkwardly titled "Largest Skinny Dipping" (swimming naked) record goes to an event organized in Ireland by Deirdre Featherstone to raise awareness of breast cancer. The event raised funds for Aoibheann’s Pink Tie, a National Children’s Cancer Charity.

    Sorry, no photos.

  • 08 of 11

    Most Nationalities in a Swimming Pool

    When: April 12, 2019 Number of Nationalities: 102 people
    Who: Yas Waterworld Abu Dhabi, United Arab Emirates

    The Guiness World Record for Most Nationalities in a Swimming Pool was both attempted and achieved by and at the Yas Waterworld in Abu Dhabi, UAE. The group event celebrated the year of tolerance in UAE.

    Continue to 9 of 11 below.
  • 09 of 11

    Largest Gathering of People Wearing Swimming Caps

    When: June 24, 2017

    Who: Ying Wa Family
    Where: Hong Kong
    How Many: The largest gathering of people wearing swim caps ever was 2,584 people

    How many people can you persuade to wear those tight swimming caps? If it's for a good cause, the record so far is 2,584 at an event organized by Ying Wa Family at the Ying Wa School campus in Shamshuipo, Kowloon, Hong Kong, China. The even brought together supporters of the school to raise funds for a new auditorium.

  • 10 of 11

    Most People Performing a Synchronized Swimming Routine

    When: August 8, 2017
    Who: Elena Martinez and friends
    Where: Ávila, Spain

    The record for the most people performing a synchronized swimming routine is 247, during an event organized by Elena Martinez in Ávila, Spain. The routine took place during a 50-year celebration of the Urbanización Coto de Puenteviejo.

  • 11 of 11

    Most Underwater Rope Jumps

    When: October 13, 2014
    Where: Raleigh, North Carolina

    Just think how much time you waste in one hour, watching TV or fooling around online. You could achieve what professional rope skipper Peter Nestler did in the fall of 2014: in just one hour, Nestler jumped rope underwater 1,871 times at a pool in Raleigh, North Carolina. Apparently, it took Nestler nearly a year to find just the right rope for attempting this Guinness record.