Believed to be more than 500 years old, the Treaty Oak in Austin , Texas , is the lone survivor of the "Council Oaks." It was here that Stephen F. Austin is said to have signed the first boundry-line agreement between the Native Americans and the white settlers. Long before white settlement, Tejas, Apache and Comanche tribes revered the tree. Indian maidens would brew a "love tea" from the tender live oak leaves, believing that if they drank the tea while gazing at a full moon, their lovers would be true forever. If this ritual was performed while the tribe was at war, the warriors would safely return.