We can't swear that there isn't one in an even more unusual location, but is seems to us that Santaland, in Rovaniemi, Finland should win this contest. According to the NAPHA NewsFLASH!!! of December, 1998, the partk, which opened in November of that year, is located inside a large cavern blasted out of a mountain. If any of our loyal readers have visited, please write us and let us know. It certainly is offbeat travel

Source: National Amusement Park Historical Association