![Dark Abandoned Railroad Tunnel is Part of This Fun Hike Near Tri-Cities](http://townsquare.media/site/112/files/2023/05/attachment-Untitled-design-2023-05-09T103822.426.jpg?w=980&q=75)
Dark Abandoned Railroad Tunnel is Part of This Fun Hike Near Tri-Cities
Plymouth, Washington is a short 33-minute drive from Tri-Cities and is famous for a number of things - including hidden treasure at the bottom of the Columbia River, a cool campground, and this fun hike near McNary Dam.