I being a person from Northern Colorado, my friends and I would get together during halloween and go visit supposed locations of hauntings. If you're thinking about visiting Fort Collins, co. I have a few places, you might want to go to scare.
The Narrows in Knox County, TX. A private conservation property with a river-filled canyon. At one point, the river cuts through an exposed coral reef dating from the Late Cretaceous period (shortly before the extinction of dinosaurs).