Brigadoon

The highland village of Brigadoon normally remains invisible, sleeping in the Scottish mists. But one day in every one hundred years, the town magically materializes. And when that day of joyful celebration ends, Brigadoon vanishes from the countryside and returns to its slumber. There's only one catch: no native can leave the village or it will disappear forever.

A pair of American hunters stumble upon Brigadoon on the single day it's come to life, and when one of them falls for a lovely lass, he is tempted to take refuge there. But then a jealous villager attempts to escape, endangering the entire town... and destroying the wonder that was Brigadoon.