Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

This hidden art nouveau gem was designed by an architect in search of a national style.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

One of two lighted lanterns hung in the church belfry on the eve of the Revolutionary War to warn that the British were on their way.

Amsterdam's former hotspot for public executions and dissections.

A public urinal so pretty, it was declared a national monument.

This beautiful architectural gem was the first waste treatment facility in Boston.

Sacks of potatoes, made of cast stone, mark where the iconic potato sheds once stood along the river.

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

This little-known rival to the Library of Congress houses one of the largest collections of pre-1876 American books, newspapers, and manuscripts.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

The once-abandoned 140-year-old hotel used in the movie "In Dreams."

One of 100 “Whaling Wall" murals painted in 13 different countries by a renowned marine life artist.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

The massive machine creates cracking displays of indoor lightning.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

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

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

The rogue roots are gradually consuming some of the historic marble grave markers.

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