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The United States National Arboretum is an arboretum in northeast Washington, D.C., operated by the United States Department of Agriculture's Agricultural Research Service. It was established in 1927 by an act of Congress after a campaign by USDA Chief Botanist Frederick Vernon Coville. It is 446 acres (1.80 km2) in size and is located 2.2 miles (3.5 km) northeast of the Capitol building, with entrances on New York Avenue, NE and R Street, NE. The campus's gardens, collections, and features are connected by roadways that are 9.5 miles (15.3 km) long in total. In addition to the main campus in Washington, D.C., there are research locations at the Henry A. Wallace Beltsville Agricultural Research Center in Beltsville, Maryland and in McMinville, Tennessee.The Arboretum functions as a major center of botanical research conducted by the USDA, including applied research on trees, shrubs, turf, and the development of new ornamental plants. In addition to a library and a historical collection (archive), the institution also has an extensive herbarium of over 800,000 specimens documenting wild and cultivated plant diversity.

The National Capitol Columns are a monument in Washington, D.C.'s National Arboretum. It is an arrangement of twenty-two Corinthian columns which were a part of the United States Capitol from 1828 to 1958, placed amid 20 acres (8.1 ha) of open meadow, known as the Ellipse Meadow.

The United Brick Corporation Brick Complex, also known as the New York Avenue Brickworks, is a historic industrial site. It is located on the 2800 block of New York Avenue, NE in Washington, D.C. on the grounds of the United States National Arboretum. The site sits on federal land, and access by the public is restricted. The kilns represent the only remaining brickyard in Washington, D.C., and one of the few extant examples of the rounded "beehive" kiln style. The structures are constructed of red common brick, lined with heat-resistant firebrick and capped with arched, brick roofs. The complex also contained eight exhaust stacks. There is a small gauge rail system, with a standard rail siding. A factory building and drying shed, which contains 38 drying tunnels, are also still visible on the site.

Hickey Run is a tributary stream of the Anacostia River in Washington, D.C.

Gateway is the name of a small industrial and residential neighborhood in Northeast Washington, D.C. It is bounded by New York Avenue NE to the south and southeast, Bladensburg Road to the west, and South Dakota Avenue to the northeast. Gateway is across New York Avenue from the U.S. National Arboretum. The neighborhood takes its name from the period when the Washington Branch of the Baltimore and Ohio Railroad ran in place of present-day New York Avenue. The eastern edge of the District of Columbia was occupied by the military jurisdiction of Fort Lincoln, but Gateway (immediately southwest of Fort Lincoln) was the first civilian area of the District through which trains passed. Gateway is the site of the printing press facility for The Washington Times newspaper.

Watts Branch is a tributary stream of the Anacostia River in Prince George's County, Maryland, and Washington, D.C.

Arboretum is a predominantly residential neighborhood located in Northeast Washington, D.C., tucked into the corner of the National Arboretum. The tiny neighborhood is bounded by New York Avenue NE to the north, Bladensburg Road NE to the west, and the National Arboretum to the south and east. The neighborhood includes the apartment community and three blocks of detached homes. The neighborhood includes the Arboretum Community Center with several gardens and play areas. The Arboretum Neighborhood Association is the neighborhood's community organization.

Langston Golf Course is an 18-hole golf course in Washington, D.C., established in 1939. It was named for John Mercer Langston, an African American who was the first dean of the Howard University School of Law, the first president of Virginia Normal and Collegiate Institute (now Virginia State University), and the first African American elected to the United States Congressas a Republican from Virginia. It was the second racially desegregated golf course in the District of Columbia, and in 1991 its first nine holes were added to the National Register of Historic Places.The course's official address is 2600 Benning Road NE. The course's front nine are located just south of the National Arboretum. Part of the course's back nine holes are located on Kingman Island, which is bordered by the Anacostia River in the east and Kingman Lake in the west.Langston Golf Course should not be confused with the Anacostia Golf Course, an 18-hole golf course also located in Anacostia Park. Anacostia Golf Course was on the eastern shore of the Anacostia River. It opened in May 1933 and closed in June 1958.

Echostage is a music venue located in the Langdon neighborhood of Washington, D.C. Opened in 2012, the hybrid nightclub and concert hall has over 30,000 square feet of space and is capable of hosting up to 3,000 guests. At its inception it was the largest nightlife concert venue in Washington DC, but was eclipsed by the 6,000 person capacity at Anthem DC in 2017. The club is a venue for EDM and other dance music with performances by bands and DJs, including Lorde, Tiësto, Avicii, Calvin Harris, Disclosure, Hardwell, David Guetta, and others. Events at the venue are managed by Club Glow, which in 2015 also opened a smaller EDM venue called Soundcheck located Downtown.In 2020, Echostage was acquired, along with Club Glow and sister club Soundcheck, by Insomniac, an electronic music event promotion company. In 2021, Echostage was voted the number one club in the world by DJ Magazine's annual "Top 100 Clubs" reader's poll, after the club had already held a place in the top ten in this ranking in previous years.

Phelps Architecture, Construction and Engineering High School or Phelps A.C.E. High School is a public high school in the northeast quadrant of the District of Columbia, United States. The school is often considered a prime example of the school investment program currently occurring in DC. Having fallen victim to time and neglect, the school was rebuilt by an award-winning architect from several smaller buildings into its current form. Along with architecture, construction, and engineering, other courses are also taught there, including vehicle maintenance/repair and operation of large vehicles such as cranes and diggers on state-of-the-art simulators. The school also has a small greenhouse where the students can tend plants. The school powers its buildings by various renewable energy sources (indicated by the color-coded pipes inside, each color denoting a different system). As part of their coursework, the school entrusts students to monitor and maintain components of this system.

Kingman Island (also known as Burnham Barrier) and Heritage Island are islands in Northeast and Southeast Washington, D.C., in the Anacostia River. Both islands are man-made, built from material dredged from the Anacostia River and completed in 1916. Kingman Island is bordered on the east by the Anacostia River, and on the west by 110-acre (45 ha) Kingman Lake. Heritage Island is surrounded by Kingman Lake. Both islands were federally owned property managed by the National Park Service until 1995. They are currently owned by the D.C. government, and managed by Living Classrooms National Capital Region. Kingman Island is bisected by Benning Road and the Ethel Kennedy Bridge, with the southern half of the island bisected again by East Capitol Street and the Whitney Young Memorial Bridge. As of 2010, Langston Golf Course occupied the northern half of Kingman Island, while the southern half of Kingman Island and all of Heritage Island remained largely undeveloped. Kingman Island, Kingman Lake and nearby Kingman Park are named after Brigadier General Dan Christie Kingman, the former head of the United States Army Corps of Engineers.

Joel Elias Spingarn High School was a public high school located in the District of Columbia, USA. The school is named after Joel Elias Spingarn (1875–1939) an American educator and literary critic who established the Spingarn Medal in 1913, awarded annually for outstanding achievement by an African American.