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 inspiration to break some other as-yet-unbroken record.
Deepest Pool for DivingWhen: Opened May 1, 2004
What: The Nemo 33 diving pool
Where: Uccle, Brussels, Belgium
Size: The pool has a depth of 108 feet (33 meters) at its deepest point. It contains approximately 660,000 U.S. gallons (2.5 million liters) of water
Brussels' Nemo 33 diving pool was designed by John Beernaerts and is used for dive training, leisure diving, research and underwater filming.
The water is kept at a constant 91.4ºF (33ºC), kept heated via assorted solar panels. The diving pool has two basins and three pits, the deepest of which is 19 feet, 7 inches (6 meters) across and drops to 108 feet (33 meters). Underwater caves for exploration and three air-filled diving bells enable diving instructors to communicate with their students without returning to the surface.
Largest Wave PoolWhen: April 30, 2009
Where: Siam Park City leisure park wave pool in Bangkok, Thailand
The 149,389-foot (13,600-meter) wave pool at Bangkok's Siam Park City has been making waves -- big, sprawling ones -- for more than 30 years.
Most People to Swim One Length in a 24-Hour RelayWhen: 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).
Longest Duration Juggling Three Objects UnderwaterWhen: February 11, 2011
Underwater juggling sensation Zdenek Bradac of the Czech Republic scored the title of "Longest Underwater Juggling of Three Objects" in just 1 hour and 30 minutes. The feat was accomplished at the Melnik Swimming Pool in Melnik, Czech Republic. Zdenek wore scuba gear and juggled three balls, using the classic cascade juggling pattern.
Largest Skinny Dipping, Multiple VenuesWhen: 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.
Largest Skinny DippingWhen: June 19, 2011
Where: Llangennith, South Wales, United Kingdom
Number of Skinny Dippers: 413
The awkwardly titled "Largest Skinny Dipping" (swimming naked) record goes to Midsummer Skinny Dip. Exactly 413 participants swam in the buff to benefit the charity Marie Curie Cancer Care.
Sorry, no photos.
Most Nationalities in a Swimming PoolWhen: September 8, 2012
Who: The Les Roches International School of Hotel Management
The Guiness World Record for Most Nationalities in a Swimming Pool was both attempted and achieved by and at the Les Roches International School of Hotel Management in Bluche, Switzerland. To prove they truly were deserving of the distinction, the students at Les Roches provided their passports as proof of their nationality.
Largest Gathering of People Wearing Swimming CapsWhen: January 1, 2012
Where: South Beach of Tybee Island in Georgia, United States
How Many: The largest gathering of people wearing swim caps ever was 2,049
The One For the Books was initiated as part of Tybee Island's annual Polar Bear Plunge, which took place afterwards. Because so many of the participants were fully clothed, they did not qualify for the largest polar bear dip. Polar bear plunge "dips" are traditionally held on New Year's Day, as a bold and freezing way of splashing in a new year.
Most People Performing a Synchronized Swimming RoutineWhen: May 31, 2008
Who: Olympium Synchronized Swim Club
Where: Ontario, Canada
The record for the most people performing a synchronized swimming routine was achieved by 186 participants at Olympium Pool, Ontario, Canada.
Most Underwater Rope JumpsWhen: August 23, 2001
Where: Montauk, New York
Just think how much time you waste in one hour, watching TV or fooling around online. You could achieve what Ashrita Furman did in the summer of '01: in just one hour, Furman jumped rope underwater 900 times at the Gurney's Inn swimming pool. Now wipe that guilt off your face and get to work!