When I lived in California, there was a bike path that wound through the town we lived in. On this bike path was a tunnel, and it was kind of creepy. As I recall it from my 13-year old memory, it was dank and wet and there were no lights (I make no representations that my teenage memory is accurate, btw). But on the other side of this tunnel was a gorgeous California hillside, to my mind one of the world's prettiest places. I knew that I had to just keep pedaling through the tunnel and I'd get to the end. It sure was a lot less scary when biking with someone else, who could go ahead and report that the tunnel was clear.