Two stone columns flank the grand Venice square, but there were supposed to be three.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

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

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

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

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

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

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

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

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

A daily replay of the experiment that proved the rotation of the Earth.

This elaborate towering structure was once famed for its revolutionary height.

A small triangle of DC grass is the final resting place of one of Sonny and Cher's songs.

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

Home to items never before seen by the public.

Historic town settled in the 19th century because of its convenient location along a popular coal transport route.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

The final resting place of many of New Jersey's most famous residents, including U.S. history's most in-vogue antagonist, Aaron Burr.