Under Atlantic Avenue is an abandoned rail tunnel, and back in 2010 they were still giving occasional tours (soon after they shut it down). I brought my tripod and my brand new wide angle zoom lens, and hung behind the group to get this shot. Supposedly, behind the wall opposite the one in the photo is a buried steam train. More details and photos here.
Note: This is the next in a series I'm doing on my photos with a crowdsourced ranking. You can see all 20 of the photos here.