It's common knowledge that spending a couple of hours surrounded by trees and plants can increase your energy. If wandering around town has worn you out, Skyline Park is a perfect place to stop and recharge your batteries.
This recreation and green space in Arena District is well-liked by travelers, so leave a spot for it on your travel itinerary. Don't think that's all there is to do here, though. There are a lot more places waiting for you to explore after Skyline Park. River Walk, Alamo and Alamodome are not far away.