Langdon is adjacent to the Northeast D.C. neighborhoods of Brentwood (west), Woodridge (east), Fort Lincoln (southeast), Gateway (south), and Brookland (north).The area served as the site of multiple reinforcements during the American Civil War (1861-1865), when a ring of forts, batteries, and trenches was built in the District of Columbia's periphery.[5] Many of the houses that today stand in the neighborhood were built starting with the extension of Rhode Island Ave. NE up from Boundary Rd.Before being deemed unenforceable in the 1948 Supreme Court decision, Shelley v. Kraemer, many neighborhood homes were subject to restrictive covenants barring ownership by non-whites.[10] The historically industrial south end of the neighborhood presently houses the large rock/electronic music venue Echostage as well as several nightclubs and a waste management facility.