Here's a picture I took when we stayed at the Whaleshead Resort, which is just outside of Brookings, Oregon. The resort offered these tunnels as your best access to the beach, as they ran directly under Hwy 101. At a little over 700 feet long and very dark, they were a fun adventure for us to experience as a family. We yelled many echoes through it and were creeped out but only just a little. We did have three manly men with us to serve as protectors...what else could we women-folk ask for?!