This former coal mine, now a fascinating museum, was the site of Belgium's worst mining disaster.

The real life town from the Pied Piper of Hamelin has a mechanical puppet show that retells the famous story many times a day.

This Rococo church is known as the most beautiful village church in the world, and does not disappoint.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

Money made from smuggling sugar helped create this wondrous rock maze in honor of the Prussian Queen Louise.

Enter the cabin of a life-sized Hindenburg replica.

Slaughterhouse Five opens its dank doors to fans of Kurt Vonnegut.

This "floating railway" is one of the world's oldest monorail systems.

An intricate and amazing house built by architect Karl Junker.

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

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.

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

A sealed test tube said to hold Thomas Edison's dying breath was given to the inventor's friend and mentee, Henry Ford.

Strange physical sensations and optical contradictions keep visitors coming back for more.

A massive, fading granite poem is all that remains of one Whitman superfan's tribute to the famous writer.

It took over 100 years to decode this enigmatic epitaph for two buried brides.

This water-locked cliff face is covered in hundreds of ancient pictographs.