Carnegie Library of Washington D.C.

Mount Vernon Square is a city square and neighborhood in the Northwest quadrant of Washington, D.C. The square is located where the following streets would otherwise intersect: Massachusetts Avenue NW, New York Avenue NW, K Street NW, and 8th Street NW.

1000 Block of Seventh Street and 649–651 New York Avenue NW are a collection of two and three story buildings in Washington D.C. which were listed on the National Register of Historic Places in 1984. They are located across the street from the Walter E. Washington Convention Center and adjacent to Mount Vernon Square, also listed on the NRHP. The buildings were mostly built in the 1870s for a German immigrant population. They have remained mostly intact since they were built even though the neighborhood around them has changed dramatically.

The Lingua is a sculpture by American artist Jim Sanborn located at the Walter E. Washington Convention Center.

The R Street Institute is an American non-partisan think tank headquartered in Washington, D.C. The Institute's stated mission is to "engage in policy research and outreach to promote free markets and limited, effective government." R Street was established in 2012 when its founders split from the Heartland Institute out of disagreement with Heartland's public denial of the scientific consensus on climate change. In addition to its Washington headquarters, R Street has branch offices in Tallahassee, Florida; Columbus, Ohio; Sacramento, California; Boston, Massachusetts; and Round Rock, Texas.

The American Federation of Labor Building is a seven-story brick and limestone building located along Massachusetts Avenue in Washington, D.C. Completed in 1916, it served as the headquarters of the American Federation of Labor until 1955, when it merged with the Congress of Industrial Organizations to form the AFL-CIO. It remained a trade union headquarters until 2005, when it was sold to the developers of the Washington Marriott Marquis hotel. The building exterior, the only historical element remaining of the building, is now part of that structure. It was declared a National Historic Landmark in 1974. It housed the American Federation of Labor for 40 years.

Marriott Marquis Washington, DC is a luxury hotel located on Massachusetts Avenue NW, in NW, Washington, D.C., United States. The hotel is connected to the Walter E. Washington Convention Center across 9th Street NW via an underground concourse. The Washington Marriott Marquis is considered a "convention center headquarters hotel", designed both to provide lodging for attendees at the Walter E. Washington Convention Center across the street, and to augment the convention center by providing smaller, more versatile meeting rooms. The hotel has 100,000 square feet (9,300 m2) of meeting room space, which includes a 30,000-square-foot (2,800 m2) main ballroom and two smaller 10,800-square-foot (1,000 m2) ballrooms. The building is topped by a 18,800-square-foot (1,750 m2) glass-encased penthouse, and a 5,200-square-foot (480 m2) outdoor event terrace. The hotel is owned by Capstone Development, the District of Columbia, ING Clarion Real Estate Investment, Marriott International, and Quadrangle Development Corporation. The operator is Marriott International. It opened on May 1, 2014, and has 1,175 rooms (which includes 49 suites), a lobby with multi-story atrium, and four dining outlets on the first floor. The hotel has 14 stories above ground, and four stories below.

The United States Mint is a bureau of the Department of the Treasury responsible for producing coinage for the United States to conduct its trade and commerce, as well as controlling the movement of bullion. The U.S. Mint is one of two U.S. agencies that produce money in the case of minting coinage; the other is the Bureau of Engraving and Printing, which prints paper currency. The first United States Mint was created in Philadelphia in 1792, and soon joined by other centers, whose coins were identified by their own mint marks. There are currently four active coin-producing mints: Philadelphia, Denver, San Francisco, and West Point.

901 New York Avenue NW is a mid-rise Postmodern high-rise located in Downtown Washington, D.C., in the United States. The structure was developed by Boston Properties in an effort to help to revitalize the Mount Vernon Square neighborhood, and was completed in 2005. It is located on a roughly triangular parcel bounded by New York Avenue NW, K Street NW, and 10th Street NW, and is north of the CityCenterDC mixed-use residential, office, and retail project. The triangular area was originally home to Victorian housing but in 1977, the city used eminent domain to purchase the area southwest of Mount Vernon Square itself, and over the next few years, the homes and businesses on these blocks were razed. In the 1980s, Golub Realty and Willco Construction purchased the site and proposed an 11-floor office block. They sold it to Peterson Co., who sold it to Monument Realty in May 1999. Monument Realty had envisaged building either an office and retail complex, or a 1,000-room hotel. They finally sold it to Boston Properties for $43.2 million in October 2000. Boston Properties closed the parking lot on the site in late August 2002, and began construction of the building the following month. The architectural height of the building is 140 feet (43 m), although the height of the main roof is just 130.86 feet (39.89 m) and the height of the top floor is 118.36 feet (36.08 m). It has 11 stories, and a four-story underground parking garage. Reports of the building's interior space vary widely, with 540,000 square feet (50,000 m2) the most recently reported by the mainstream media. The facade is of polished granite and precast concrete in two colors. An atrium three stories in height with 36-foot (11 m) long arched steel trusses forms the lobby. Two very small parks exist on the triangular parcel of land, which are owned by the National Park Service. Acadiana, a 185-seat upscale restaurant on the ground floor which served Louisiana-and Cajun-style seafood was cited by Esquire magazine as one of the best new restaurants in the entire United States in 2006. The restaurant closed in December 2018, and as of January 2019 no replacement tenants have been announced. Miami-based Yardbird Southern Table & Bar has taken Acadiana's former space in April 2021.

The Walter E. Washington Convention Center is a 2.3-million-square-foot (210,000 m2) convention center located in Washington, D.C., owned and operated by the city's convention arm, Events DC. Designed in a joint venture by the Atlanta-based architecture firm Thompson, Ventulett, Stainback & Associates, Washington, DC- based architects Devrouax & Purnell Architects Planners PC and Mariani and Associates, the convention center is located in a superblock bounded by Mount Vernon Square and 7th, 9th and N streets, N.W. It is served by the Mount Vernon Square station on the Yellow and Green lines of the Washington Metro. It was completed in 2003.

The Henley Park Hotel is a 96-room boutique style hotel located on 10th street and Massachusetts Avenue NW in Washington, DC. It features an upscale restaurant, The Tavern, and is noted for its unique architecture. The Henley Park Hotel is a member of Historic Hotels of America, the official program of the National Trust for Historic Preservation.

Calvary Baptist Church is a Baptist church located in the Chinatown neighborhood in Washington, D.C. affiliated with the American Baptist Churches USA, the Cooperative Baptist Fellowship, the Baptist Peace Fellowship of North America, the Alliance of Baptists, the District of Columbia Baptist Convention, and the Association of Welcoming and Affirming Baptists.In July 2012, the church severed ties with the Southern Baptist Convention. Since 2017, Calvary's Senior Co-Pastors have been Rev. Sally Sarratt and Rev. Maria Swearingen.

Friendship Archway is a paifang installed at Chinatown, Washington, D.C., United States. It is one of the largest ceremonial arches outside of China.