Get some exercise and explore southeastern Houston with your furry buddy on the Columbia Tap Rail-Trail! Built on the former Houston Tap and Brazoria Railways, this 4-mile concrete trail will lead you and your pup through the Third Ward and into downtown. Some of the sights you'll see during your walk are the Texas Southern University campus, churches, and native trees. Benches are also scattered along this trail, allowing you and your pooch to take breaks.Â