The building in the foreground is the 96-room guest house, primarily used to house conference participants and other short-term visitors. Above the guest house is the main research building, a three-story structure terraced into the side of a hill. The brick farm and carriage houses belonging to the original Janelia Farm can be seen near the top center. To the left are 60- and 80-unit apartment buildings that, along with 21 studio apartments and 34 multi-bedroom townhouses (not shown in this view), provide housing for more than one-quarter of those working on campus. An additional 100-unit apartment building and six single-family residences are planned. The Potomac River is approximately 300 meters to the North (downward). The campus covers an area of 281 acres plus a 408-acre island, Selden Island, located in the Potomac River and connected by a bridge. Photograph credit: Anthony Leonardo/HHMI.