If thrills are what you're after, head to Expo Park, located 2.6 mi (4.2 km) from central Daejeon. If you have fun at Expo Park, you'll love Hanbat Arboretum and National Science Museum, both located nearby.
You can take time to visit Yuseong Hot Springs during your travels to Daejeon. Stroll along the lakeside or visit the spas while you're in the area.