A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

Learn about the history and craftsmanship of carousels inside this museum located in a former post office.

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

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

Every drop of D.C. tap water flows through this old waterworks.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

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

A hidden passageway now marks the site of an assassination attempt on Ronald Reagan that some say broke a 140-year-old curse.

Look closely and you’ll notice that the color changes a third of the way up the tower.

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

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

Before Metro, Washington had a robust streetcar network—and you see the remains of this infrastructure if you know where to look.

The only place for a truly presidential dram.

A bas relief commemorates the "Nuns of the Battlefield" who cared for soldiers on both sides of the conflict.

100 years later, they're still down there.

A historic arena where the Beatles played their first concert in the U.S.

Once America's tallest structure, now a Baltimore landmark.

Before Nixon, "watergate" meant canals.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

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

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

Art deco landmark on the outskirts of Washington, D.C.

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.