The next day we took bus no.700 to visit Manjanggul Lava Tube 만장굴 a UNESCO World Natural Heritage in Gimnyeong-ri. Manjanggul Lava Tube 만장굴 is the largest cave and the only one that is open to the public. We were really amazed by this Lava Tube, the Lava Flow lines in particular amazed us, to imagine that we would have been totally covered by Lava left us in awe. Maze Park is also 1.7 km from the Manjanggul Lava Tube 만장굴 we walked there, well we basically walked everywhere under 10 km. The Maze Park has an entrance fee of ₩3300 ($3.3).