Two Thousand Maniacs!

Two Thousand Maniacs! is a 1964 American supernatural splatter film written and directed by Herschell Gordon Lewis and starring William Kerwin, Connie Mason, Jeffrey Allen, Ben Moore, and Gary Bakeman. It follows a group of Northern tourists who are savagely tortured and murdered during a ghostly Confederate celebration of a small Georgia community's centennial. The story was inspired by the 1947 Lerner and Loewe musical Brigadoon, which also features a spectral town that manifests once every hundred years, populated by ghosts of its past inhabitants.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.