Purchase a ticket to see a game at Daejeon World Cup Stadium. If there's nothing happening while you're in town, you might like to check if they offer a guided tour of the facilities.
This Yuseong sporting facility is an interesting place to begin your day of sightseeing. There's lots to explore in the area, like Donghaksa, Korea Advanced Institute of Science and Technology, and Expo Park. Take your time at Daejeon World Cup Stadium before heading to these other fine sights.
