With so many historic structures, neighborhoods, and an elaborate transit infrastructure, D.C. is a prime location to engage in a little urban exploring. Urban exploring, which some refer to as infiltrating, is the practice of entering, exploring, and usually photographing places closed to the public.

An Aug. 15 Post story, titled “Caverns and Canyons of the Capital,” has plenty of ideas for even the most amateur urban explorer: a “massive, darkened basement” under the Lincoln Memorial, a 495-space parking garage beneath the Air and Space Museum, and restrooms dating from the 1900’s under Mount Vernon Square.

After making a few inquiries, we found there are a few urban explorers in the capital city …