Our list of 10 must-see Colorado railroad attractions starts with a ... is now an 8 1/2-mile unpaved scenic highway, the Gold Camp Road, maintained by the National Park Service.

From beachside views in Cape Cod to mountain climbs in Colorado, the US offers diverse scenic train rides that aren't Amtrak (even though Amtrak is always a favorite!). Amtrak's chugging rhythms ...