We went on a ferry ride and a touristy cave on a day trip with Adventure Korea. It was worth the $40, but I think the highlight was the ferry ride. The cave was pretty, but we had 80 people trying to walk through it in an hour. Next time, maybe we'll try a smaller group. Anthony said this site used to be a cave, but it collapsed and all that is left is the stone archway.
Here are some photos of Anthony and I at Soraksan National Park. Anthony climbed to a peak, while I took a cable car up into a different area. There were Buddhist temples all over, and lots of water falls. The mineral water stream tasted naturally fizzy! It was cool!
Here is our lunch after our hike