The Haunted Mine Drop Attraction in Colorado Drops Riders ...
· Once inside the building, the storyline continues with mining relics, vintage signage and video effects until the new employees enter the drop room where they'll be lowered into the mine. A Pepper's ghost, an illusion technique invented by Professor John Henry Pepper and English engineer Henry Dircks in the 1800s, appears to tell the real story behind the mine's closing so many years ago.