This golfball sized platinum iridium cylinder is the official starting point for all national weight calibrations

A massive mausoleum towers over the gravestones in a 19th-century Italian "model village."

A statue of the second-tallest Dutchman in history.

The skeletal white beams stand as a monument to religious dissent.

The risqué mixed-media sculptures are supposedly a metaphor for Czech politics.

A place for ship-lovers to watch the passage of freighters traversing the Great Lakes while learning about their history.

An abandoned textile factory on the "island of crows" was home to Estonia's first workers' strike.

A stone marker memorializes the spot where the King broke up a street fight with a classic karate stance.

It was originally part of a "terrible lizards" collection at the 1964 New York World’s Fair.

A memorial to a shareholder activist feared by CEOs around the United States.

The 16th-century church has the only stained glass windows that survived the Scottish Reformation intact.

More than 5,000 artifacts donated by the people of the city, plus a room entirely devoted to the band U2.

Julia Buccola Petta's body was peculiarly well-preserved when it was exhumed six years after her death.

Henry VIII's forgotten castle was built by the gunpowder-obsessed king to be defended solely by cannons.

This architectural beauty is the home to a personal collection of more than 600 examples of mechanical musical instruments.

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

A symbol for the opposition to nuclear power around the world.

Peeing dogs guard the Roman hunting goddess atop a fountain at France’s Château de Fontainebleau.

The largest brick bridge in the world.

It's good luck to be mocked by this monkey.

The fight to make Bengali an official language started in this stunning university hall.

The discovery site of the "Capitalsaurus," the official dinosaur of Washington, D.C.

Plymouth's huge yet little-known memorial to the Pilgrims.

Eight naturally mummified bodies in glass coffins are housed in an underground crypt.