Chattanooga is a large city just north of the Georgia border. Chattanooga is also the 68th largest city in the United States between Las Vegas and Philadelphia. With the city being that large it is also 5% water. In 2015 the cites population was roughly 180,000. The city is within a valley and is surrounded by the Appalachian mountains. Also just north of downtown Chattanooga is a Hydroelectric dam on the Tennessee river.
Ruby Falls is a 145 foot underground waterfall in Chattanooga. The waterfall has an unknown source but they put dye in the water and traced that it empty's out in the Tennessee river.
Also in Chattanooga is Lookout mountain which is one of the tallest mountains in Tennessee. Also, on top of Lookout mountain there is a point were you have the ability to see 7 states a one time.
Lastly in Chattanooga you can go to the Tennessee river aquarium which shows all the aquatic wildlife in the Tennessee river. It also has an IMAX theater inside of the Aquarium.