A Spiritualist house of worship where believers communicate with the dead in the spirit world.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

This lovely pocket park is one of the most under appreciated in D.C.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

Decades before the scandal, this staircase on the river was a literal "water gate."

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

An overlooked memorial honoring the local Washington residents who died in World War I.

Need a hardcopy of the 50-title Code of Federal Regulations? This is the place.

Obscure Freemasons still live in D.C.’s largest private residence.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The grand marble structure next to the White House is Andrew Carnegie's temple to Pan-American diplomacy.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

A line of blue paint marks the route of the inaugural parade.

Come for the flowers, stay for the bats!

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

This automated sculpture of two men peeing will spell out text messages with their micturition.