Washington, DC, has done something remarkable: published a granular, house-level map of the city’s lead pipes. The data, released earlier this week, shows that at least 12,000 buildings ...

The best Washington, D.C., maps we saw this year came in many forms – some informative and some more imaginative. Nevertheless, they all made writing InTheCapital's weekly Map Fix series a pleasure.

A flight map reveals the route of the doomed plane that crashed into the Potomac River in Washington DC after hitting a military helicopter mid-air. Horrifying video shows a fireball in the sky as ...

Six of the ten richest counties in America are in Virginia and Maryland, clustered around the Washington, D.C., metro area. Six of the ten poorest counties in America are in Mississippi or ...