The sled field on the fozen river at the Korean Folk Village is great fun. It is included in the price of your admission ticket. There are plenty of sleds and "oars/ski poles" to propel you around the ice circuit. It is very good exercise. Try doing three laps at high speed!
For first-timers: you sit cross-legged on the sled and propel yourself forward by driving the ski poles as hard as you can into the ice. Once you pick up speed, you need to use one ski pole only sometimes in order to steer round corners. Be prepared to swerve around other sleds slowing down or stopping in front of you. Have fun!
Suwon was one of the host cities for the 2002 world cup finals. An impressive new stadium was built for the occasion. Now K-league matches are played there.