This 18th-century sundial was designed to calculate the date of Easter each year.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.

135 bronze medallions mark a French meridian line which once rivaled the hotshot Greenwich timeline.

At Monet's beloved home you can still see the Japanese bridge, waterlilies, and weeping willows that were the subjects of some of his most iconic paintings.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Machismo turned on its head: the lady's hand goes to the dude with the bigger brain.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

A lush indoor jungle fills this bustling Madrid transportation hub.

Amsterdam's former hotspot for public executions and dissections.

Home to a vast and influential collection of Shakespeareana.

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.

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

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

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

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

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

Go take a picture with the inventor of the daguerreotype photographic process.

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

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

A rotating cast of guys and dolls in front of a Washington, D.C. building.