The second-highest train station in Europe.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

Lucerne's central prison was converted into a tourist hotel with a bare minimum of changes.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

A unique bridge with an equally unique view.

This airport currywurst stand is made out of retro airplane parts.

A preserved college lock-up that recalls a clubhouse approach to discipline.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

This historic funicular system combines the old with the new while offering delightful views over the surrounding valley.

The last bastion of Roman presence north of the Alps looms over a German town.

The world's tallest church tower reveals a spectacular view to anyone up to the task of climbing the daunting staircase.

Enter the cabin of a life-sized Hindenburg replica.

A fearsome dragon clings to a corner of Munich's city hall.

The footprint of a frustrated devil in Munich's Cathedral.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

This former farm In northern Iceland is now a museum, where visitors can tour beautifully-preserved turf houses.

The prototype for all Nazi concentration camps.

A striking 12th-century-style castle built on the edge of a cliff.

The fairy tale castle of the "fairy-tale king."

Walk inside a half mile long crevice right outside the town of Garmisch Partenkirchen.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.