This local tunnel is the longest highway tunnel in North America and goes only one way over the railroad tracks - meaning the same road is shared with the train! With just one lane it's definitely a unique experience driving through 2.5 mile long tunnel. On the other side, you'll find the adorable town of Whittier - just plan accordingly if you have a tour or scheduled activity, the tunnel only runs twice each hour (once each way). You'll also need to pay a small fee depending on the size of your vehicle, regular passenger cars cost $13.