Manhattan Island Marathon Swim -  this is a 48km annual event held in New York which begins and ends at Battery Park. Read more about how Tammy won the event in 1997.

English Channel - in 1993, Tammy attempted her first crossing of the Channel and set the fastest time for the year. Her brother, John, also attempted the Channel but, unfortunately, was taken from the water 4km away from the coast of France with hypothermia. Read more about their Channel experience.

Bass Strait - this is one of the most treacherous pieces of water in the world, located between Victoria and Tasmania, Australia. Read more about how Tammy became the first and, to date, the only person to accomplish this achievement in February 1996.

Cook Strait - located in New Zealand between the North & South Islands, the Cook Strait has the reputation of being the Southern Hemisphere's equivalent of the English Channel. Situated on the "roaring forties" fault line, the winds and tides play havoc with even the strongest of marathon swimmers. Read more about how Tammy became the fastest person across the Strait from North to South.

Loch Ness - the mystical Loch is known to many of us, as is the legend of Nessie. Read how Tammy managed to overcome her fear and the freezing waters to swim the 40km length of the Loch.

Murray River - beginning in the high country in Corryong, Victoria, the Murray River is Australia's longest river system, a total of 2438km. Read how Tammy managed to endure swimming for 106 consecutive days to finally reach the Mouth of Murray in South Australia.

Gippsland Lakes - this is largest inland waterway system in the Southern Hemisphere. Read how Tammy managed to conquer the Lakes as part of World Environment Day celebrations, 6 June 2004.