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

The only structure left with direct ties to the Salem witchcraft trials of 1692.

A town filled with hot chocolate, dazzling lights, and lots of Christmas cheer.

A whimsical sensor instrument for Minneapolitans to play on their walks to work.

1887 era Russian Orthodox church in Minneapolis.

Sleepy Minneapolis block beats Guinness Record for most churches on one city block.

A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This old KLM airplane cut into three parts was transformed into an eclectic airport gift shop.

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

Along the banks of the River Rhine lies a park that seems unassuming, but beneath the surface lies a long and fascinating history.

A famed artist's inspiring work of peace and tolerance.

While you wait to cross the street at a traffic light in Mainz, you might notice that the light is staring back at you.

The "Prussian Versailles" that is as glorious today as when it was built.

Tiny memorials honor individual victims of the Holocaust.

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

One of the world's heaviest musical instruments towers within a popular urban park.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

This monumental work of art symbolizes the coming together of a previously divided city.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

Art and a pun, all in one.