@durmay: While the original was filmed in Scotland, and the opening scenes were set there as well, the main events took place in a North Carolina cave. Because they were exxxtreme globetrotting danger addicts, and because bizarre inbreeding must needs be set in Appalachia. It's a rule. #descent2
It's a tactic. Mark Evanier probably knows more about animation production than anyone else in Hollywood: see his post on this at his website: http://www.newsfromme.com/archives/2009_07_17.html#017446
