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

Built by the patriotic residents of Boonsboro in a single day.

A reminder to choose water over wine since 1888.

The grand, column-fronted, sculpture-adorned home of the ambitious digital library.

Before Nixon, "watergate" meant canals.

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

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

In an odd geographic anomaly this city borders two different states on opposite sides of town.

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

Once a black market electronics marketplace, now an otaku shopper's paradise.

The oldest Dutch colonial stone house in New York City is a hidden gem on the border of Brooklyn and Queens.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Beautiful mosaics cover the first stations opened on New York City's newest subway line.

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

The "Seinfeld" diner.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

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

During the holidays, a vintage subway train whisks New Yorkers back in time.

This working class sculpture pounds his hammer all the livelong day.

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

A shining, cold, black organ lies in San Francisco's financial district.

The bridge's highly-contested plaque (once again) honors Confederate President Jefferson Davis.

A small Richmond island dotted with the remnants of hundreds of years of history.

Created in 1972, the famous sculptor's intricately detailed monument to San Francisco is overflowing with city landmarks.