After hiking back down I bought a souvenir for my adorable niece, who would be turning 3 in 3 days from them and got on a bus to head about half way back to stop by the lava tubes. The bus drops you off not that close to the tubes entrance and so i hitched my way on in. The lava tubes as well are neat from a scientific level but they are essentially dark, wet long caves. For some reason I thought they'd be warmer, big mistake. brrrr. A little info on the lave tubes.
"Jeju Volcanic Island and Lava Tubes together comprise three sites that make up 18,846 ha. It includes Geomunoreum, regarded as the finest lava tube system of caves anywhere, with its multicoloured carbonate roofs and floors, and dark-coloured lava walls; the fortress-like Seongsan Ilchulbong tuff cone, rising out of the ocean, a dramatic landscape; and Mount Halla, the highest in Korea, with its waterfalls, multi-shaped rock formations, and lake-filled crater. The site, of outstanding aesthetic beauty, also bears testimony to the history of the planet, its features and processes."
After finishing the tour I got some lunch for the day, Sea Urchin soup, yum!!! I then saw the 3 guys who gave me a ride to the entrance and asked them for a ride to Jeju. Score!