The bridge that cost Germany a World Heritage Site.

A bridge that has seen many reiterations over its lifetime.

A museum that chronicles the history of the Nuremberg Trials for Nazi war criminals in the building where the trials were once held.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

The architect of this fanciful complex called it an "oasis for humanity and nature in a sea of rational houses."

The medieval institution is home to the precious treasure stolen in World War II in one of the greatest art thefts of the 20th century.

A wonderfully eccentric Victorian-era museum and library.

An impromptu shrine appeared shortly after beloved "Torchwood" character Ianto Jones was killed off the show.

Recently restored menagerie of Victorian-era beasts.

This pedestrian walkway cuts through a cemetery and over several burial vaults.

A holy well believed to have healing powers.

A little-known castle set in a nature reserve.

The spot where three Protestant clergymen were burned at the stake during the reign of "Bloody Mary."

This centuries-old pub boasts a collection of more than 4,500 snippets of neckties from around the world.

This 11th century tower is said to be the oldest building in Oxford.

With over 10,000 lights, this engineering marvel lights up the city after dark.

A Saxony castle houses one of the largest and most outstanding mineral collections in the world.

This former hostel is now an art gallery and a memorial for 15 backpackers who lost their lives to a tragic act of arson.

Visitors flock to the historic birthplace of radiobalneology for its therapeutic radium treatments.

Dedicated to the history of mining and minting in a region rich in silver and radium.

A museum honoring Germany’s cucumber mecca offers a great dill of gherkin history.

The industrial monstrosity known as Bagger 258 is a colossal mining machine built in the DDR - but now left for dead in a German field.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.