Bathyscaphe Trieste
Trieste is a Swiss-designed, Italian-built deep-diving research bathyscaphe, which with its crew of two reached a record maximum depth of about , in the deepest known part of the Earth's oceans, the Challenger Deep, in the Mariana Trench near Guam in the Pacific. On 23 January 1960, Jacques Piccard (son of the boat's designer Auguste Piccard) and US Navy Lieutenant Don Walsh achieved the goal of Project Nekton.
Katie Melua
On 2 October 2006, Melua entered the "Guinness Book of Records" for playing the deepest underwater concert 303 metres below sea level on the Norwegian Statoil's Troll A platform in the North Sea. Melua and her band underwent extensive medical tests and survival training in Norway before flying by helicopter to the rig.
Melua later described achieving the record as "the most surreal gig I have ever done". Melua's concert is commemorated in the DVD release "Concert Under the Sea", released in June 2007.