This building was formerly a post office. It is also listed as a National Historic Landmark. When the Hotel Monaco opened in 2002, Condé Nast Traveler named it one of the world's 80 best hotels.

This hotel, composed of two combined buildings, was once a hostel for military men and was also a headquarters for a service organization that served dowagers with clout. Later, first ladies of upper-class women utilized the venue as a gathering place.

On the site where this hotel is located, it housed the homes of Abraham Lincoln's private secretary John Hay and political journalist Henry Adams.

A myriad of diplomats have booked rooms in this hotel. Before the hotel opened, it was a luxury apartment house.

In 1938, this development became the first air-conditioned hotel in Washington, D.C. In the mid-1950s, it also housed the District's first TV station (now known as Fox Channel 5) and transmission tower.

Originally, this structure served as an apartment building and housed notable Senators and Congressman. It wasn't converted to a hotel until 1982.

In this hotel, you can find what's called a "Women's Floor." This floor is dedicated only to "the needs of the female business traveler" with spa bathrobes, skin and hair care products, and personalized concierge services.

This hotel is styled like a traditional Irish inn and features an Irish pub and restaurant on the ground floor. When the hotel opened in 1922, it was known as the Commodore. In the 90s, the new Irish-American owner renamed the hotel in honor of the largest urban park in Europe, found in Dublin. U.S. President Bill Clinton, Ted Kennedy, and Tip O'Neill were guests of this hotel.

While this development was built in 1917, Tabard Inn didn't open until 1924. The structure, itself, is three late Victorian townhouses.

Former FBI Director J. Edgar Hoover used to enjoy dining in this hotel.

This hotel has had four different name changes, from the Carlton Hotel to the Sheraton-Carlton Hotel back to the Carlton Hotel and finally to its current moniker the St. Regis Hotel. The hotel is listed on the National Register of Historic Places.

This hotel has housed a myriad of celebrities, including Jackie Kennedy, Jimmy Carter, U.S. presidents George H.W. Bush and Bill Clinton, and Frank Sinatra.

This hotel survived through the Great Depression and WWII. It also houses European and Oriental art and relics.

Every U.S. president from Franklin Delano Roosevelt through Bill Clinton were guests at inaugural balls in this hotel.

The first black guest in this hotel was Larry Doby, who was also the first black baseball player to integrate the American League.

The Doors and Jimi Hendrix have performed in this hotel's ballroom. It was also the site where John Hinckley, Jr. attempted to assassinate U.S. President Ronald Reagan on March 30, 1981.