Esperance was a town in Western Australia close to where at least a portion of Skylab fell. The Tenth Doctor once spent some time near Esperance while rebuffing a Zalphon invasion with a local lad named Harvey. (PROSE: Bennelong Point)
Behind the scenes
Esperance is both a town and a shire of Western Australia, and it really was where part of Skylab fell. Though un-remarked in the story, the town charged the United States of America for littering because of the event. Though the fine was ignored by the federal government, it was eventually paid by American citizens in 2009.