Andy Griffith's hometown has made itself up to look like the fictional town of Mayberry.

A folk art mecca famous among outsider art fans.

Home to items never before seen by the public.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

Bar full of oddities, specimens, artifacts and homages to the great dime museums of the past.

America's Most Wanted's set resides in this tribute to the history of crime and punishment.

D.C. once had its own tiny rival to the New York Stock Exchange.

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

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

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

When it comes to handsignals (and colonialism) rock always beats scissors.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

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

This robust fence in front of a historic Georgetown home is likely made from hundreds of recycled Revolutionary War firearms.

One of the largest artillery pieces in the world sits in a Washington D.C. parking lot.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

This unacceptably tall building was the real reason for Washington, D.C.'s skyscraper ban.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

Washington's iconic carousel has a nice piece of Civil Rights history.

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

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

The national park was once a plantation estate.

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