Places williamf Wants to Go

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

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

A brass plaque dedicated to a convicted cannibal hangs in the National Press Club, and that's not even the craziest part of the story.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

This doorless 20th-century elevator doesn't stop or slow down.

This artificial cave looks like something out of a fairytale.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

Two stunning 17th-century libraries and a cabinet of curiosities.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

A giant interactive periodic table with real samples of the elements.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

The world's largest reflecting pool is just two centimeters deep.

This small red school was where Germany signed their surrender during WWII.

Bits of architecture from a town destroyed in World War I now decorate this hotel garden.

An image of the legendary saint stands in the shadow of a cathedral she liberated.

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

The only remaining collection of flayed figures made by French "madman" Honoré Fragonard.

The former global standard for the exact mass of one kilogram sits under lock and key outside Paris.

A total of 22 tiny bridges cross this canal of the Yvette River, forming a unique trail.

France's Lilliputian park displays over 100 of the country's monuments for visitor perusal.

This tower is one of the best-preserved (and least-visited) remnants of medieval Paris.

This renovated Art Nouveau bathroom from 1905 is worth the price of admission.