This misty tunnel was awesome. There were tunnels between several of the buildings, but this one was particularly photogenic. The underground area was much cooler than it was outside on the hot and humid day. The humidity caused some misty fog to form, which was really cool.

@mikepj Woah, very cool indeed! What was the purpose of the tunnels?

@mikepj Nice. And a great snap. But am sure walk down alone in here might give one .. chills.

@smokey Thanks. They were old steam tunnels for heating in the winter.

@amit Thanks. Yeah we were in a small group of maybe 8-10 at this point, but walking alone would definitely be a different experience. Other times we were on our own, and the basements were especially creepy to explore.

@jmac3665 This was underground at the Traverse City State Hospital in Michigan.