Whittled by a half million years of wind and rain, the haunting claystone hills and buttes of Badlands National Park rise above the surrounding sea of grasslands.
The light jumps and flickers, making everything inside the cave seem as if it's flickering and shifting, giving an air of haunting otherworldliness to the cave.
Sometimes it's foot stomping and rousing and sometimes it's haunting, mysterious, and a lot of that is based on the kind of period of the movie itself.
But it begins with a haunting image in silhouette, the kids' bikes chained up in a row at the cave entrance, football boots, shin pads left behind with no sign of their owners.
Instead, the longer wavelengths of red to yellow are able to pass through these particles and reach the surface of the earth, giving way to this haunting effect for us to see.