Are there any train lovers out there? Specifically, are there any tunnel lovers out there? I absolutely love tunnels. I love everything about them – their darkness, cave-like qualities, echoes, and the fact that almost always, there is literally a light at the end. I have driven through tunnels dug into mountains, giant underground tunnels carrying foot and automobile traffic underneath large cities, and I have walked through tunnels underneath streets and carved into the trunks of giant redwoods in California. The whole concept of tunnels and their different types fascinates me. Plus, echoes, amiright?