Austin Continued.....the river that ran next to our hostel in austin was very interesting the city would open and close the dam and create tides on the river if you can see in the morning the dock was well out of the water and then at night it was completely submerged....also in austin is one of the worlds largest bat colonies in an urban setting, under this bridge there are nearly a million bats which live and they all fly out at the same time every night