From 1949 until 1962, DC Transit trolleys ran in a subway under Dupont Circle. Those subway tunnels are still there, boarded up and unused. I got a tour of the old tunnels yesterday, and detailed the trip with a set of pictures.

You can preview the pictures using the slideshow below, but the best way to see them is on flickr itself, where you’ll get a full description of each one. If you use flickr directly, you can navigate to subsequent pictures using the thumbnails on the right side of the page. If you look at each picture in order and read each description, you’ll pretty much be getting the same tour I got in person.