Saekhyeon Tunnel is a car-free tunnel on the Bukhangang bicycle path between Gapyeong Station and Cheongpyeong Station. The inside of the tunnel is cool and good for taking photos. The approach to the tunnel from the Bukhangang bicycle path is uphill, and the way out continues downhill. The bicycle path and walking path are separated, but signs are lacking, so first-time visitors can get lost.