From the choppy East River in New York to the more tropical waters of Fiji, it is a great time of year for open-water swimming events.
September is also a particularly dramatic time to witness the great migration when huge herds face the obstacle of the Mara River.
Michelle Jana Chan takes a look at these and other great things to do around the world in the coming months.
Get in touch with Fast Track via
Watch Fast Track on the BBC World News channel on Fridays at 2230 GMT, Saturdays at 1230 and 1830 GMT or Sundays at 0730 GMT.