I ran across an interesting article today about underground tunnels, most notably about Tacoma. There was also mention of tunnels under Portland, but the focus is on the “Shanghai Tunnels” under downtown. As an urban explorer enthusiast, I’m really curious about tunnels, holes, caves, and anything else dark and underground. Or anything that many people don’t get to see.

So, have you ever found a tunnel like this? Know of any?

Read on: http://bldgblog.blogspot.com/2008/07/mysterious-chinese-tunnels.html