I was kind of surprised that I've never found a thread or any mention of the Conway tunnel before. It's pretty tight, although still active, which has resulted in at least one instance of me using the bathroom on myself. (The first turned out to be water dripping onto a tarp from the top of the tunnel, but damned if it didn't sound like a train.)
Here's a train coming out of the tunnel.
Here's one a friend took.
I've been 4 times, but all have been at night. As a result I don't' have any pictures worth showing. The tunnel isn't that big, about 1/4 of a mile at most. Here it is on google maps. If that isn't helpful to you or you're just lazy but still want to go, shoot me a PM and I'll give you directions. While I don't think you'll be trespassing, I don't want non-UOers out there getting the attention of police and making this place inaccessible.
