Wadjemup means "place across the water" and refers to Rottnest Island (or Rotto or Rottnest is the local vernacular). It is located 18 kilometers off the coast of Western Australia, near Fremantle. The island is 11 kilometers long, and 4.5 kilometers at its widest point with a total land area of 19 km². It is the finish location of the annual Rottnest Channel Swim and is managed by the Rottnest Island Authority.
It has been an important local holiday destination for over 50 years. The Rottnest Island Authority collects revenue by imposing a landing fee" on all visitors to the island.