The Brickpit
Australia Ave.
free
Homebush Bay was an industrial site before it was remodeled as Sydney Olympic Park. The brickpit area was preserved because the post-industrial area was also habitat to several species of rare frogs, including the endangered green and gold bell frog. The brickpit site has a high elevated walkway ringing the site. The engineering is quite impressive. There are interpretive displays as you walk the ring. It is unlikely that you will see any of the tiny frogs all the way down in the water filled pit, but there are binoculars if you wish to try your luck.