You can drive through a number of abandoned railroad tunnels just down the road near Buena Vista, Colorado. Have you visited the Midland Railroad Tunnels on CO Road 371?
Check out what some Coloradans refer to as Ghost Town Disc Golf, a disc golf course that runs through the wilderness and ends in a real-life ghost town.
The Coeur d’Alene mine in Central City, Colorado was once the site of a freak accident that killed the town’s mayor and, along with neighboring buildings, is now abandoned.