Hundreds of secret cabinets built into the walls of legendary poisoner's private work room.

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

A second generation sun-powered marvel lights up the night.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

A larger-than-life statue of the German revolutionist stands proud in a small town where he never lived.

In addition to fine dairy products, the world's most beautiful milk shop also offers a feast for the eyes.

This unique Renaissance castle was turned into a home for Nazi occultism.

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

This historic stone bridge has an entire neighborhood clinging to its sides.

These 18th century gardens tell a rocky story of the son of Odysseus.

A quaint Russian village in the middle of a German metropolis.

Ruins of a German Castle on top of a towering stone pillar.

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

The ruined remains of the airport Claus von Stauffenberg departed in his failed attempt to kill Adolf Hitler.

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

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

This German museum is devoted to all aspects of grave culture from headstones to coffins.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.