Buy tickets and join the fans at a game at Peoples Natural Gas Field. If there's nothing happening while you're in town, you might like to check if they offer a guided tour of the grounds.
If you're staying a while in Altoona, Peoples Natural Gas Field is a good place to start your exploring. This sporting facility is one of many attractions worth seeing here. Penn State Altoona, Lakemont Park and the Island Waterpark, and Canoe Creek State Park are also waiting for you nearby.