Australia is a Level in Tony Hawk's Underground 2
It is set in Sydney near Bondi Beach.
If the player walks close to the New South Wales Police Officer he will punch the player to the floor.
If you are walking towards near the water the Security Guard will tell you off.
However, in Falco-Off, (The Boondocks Season 1 Episode 10) Falco, Flo, and Sabrina were going underwater from the song "White Noise".