Tree sitting is a form of environmentalist civil disobedience in which a protester sits in a tree, usually on a small platform built for the purpose, to protect it from being cut down. Supporters usually provide the tree sitters with food and other supplies.

Waller Creek is a stream and an urban watershed in Austin, Texas, United States. Named after Edwin Waller, the first mayor of Austin, it has its headwaters near Highland Mall and runs in a southerly direction, through the University of Texas at Austin and the eastern part of downtown Austin, including the Red River Cultural District, to its end at Lady Bird Lake.