Brigadoon

Two Americans on a hunting trip in Scotland become lost. They encounter a small village not on the map, Brigadoon, in which people harbor a mysterious secret and behave as if they were still living 200 years in the past.

Brigadoon is a 1954 musical fantasy movie directed by Vincente Minnelli, starring Gene Kelly, Cyd Charisse, Van Johnson. It holds an IMDb rating of 6.8/10 from 10,088 votes and runs 1h 48m.