The Texarkana Federal Courthouse and Post Office sits directly on State Line Avenue, the only federal building in the country occupying two states. The exterior is a dignified Beaux-Arts structure, and the state line stripe painted across the pavement outside is the city's signature photo opportunity. The interior handles federal business for both Arkansas and Texas; the building genuinely functions as a single facility split by a state boundary.
State Line Courthouse
A story
The Texarkana Federal Courthouse and Post Office is the only federal building in the United States that sits in two states simultaneously. State Line Avenue runs right through it — you can stand on the steps with one foot in Texas and one in Arkansas. The postal address lists both states. A painted stripe on the pavement outside marks the boundary, and the obligatory photo with arms and legs spanning two states is taken by virtually every visitor.