Road Trips Explore Alaska’s Heartland National Parks by Ferry A train arrives at the Portage Glacier entrance to the one-way Anton Anderson Memorial Tunnel A train arrives at the Portage Glacier entrance to the one-way Anton Anderson Memorial Tunnel Share this Facebook Icon Twitter Icon Email Icon Join National Park Trips Create a personalized feed and bookmark your favorites. Join for free Already have an account? Sign In Join National Park Trips Create a personalized feed and bookmark your favorites. Join for free Already have an account? Sign In