This splendid tomb may look fantastic, but there's nothing in it...

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

The Habsburgs' royal collections of art and wonders.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

Baroque celebration of the end of the Great Plague of Vienna.

The beautiful baroque library of the Hapsburg empire.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

The most visited, and possibly most controversial, museum in Germany.

Berlin's old airport.

Metro station with a claim to rock n' roll fame.

Home of the Large Hadron Collider and the birthplace of the World Wide Web.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

France's national museum of scientific and industrial instruments.

This bridge was constructed from the rubble of the infamous Bastille.

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

The celebrated eyesore created by starry-eyed sweethearts.

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

This modest marker near Notre Dame identifies the very center of Paris.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Statue of death tucked in the University of Medicine courtyard.

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

Site of a classic 19th-century physics experiment to prove the earth is rotating.

This museum houses an imposing skeleton army comprised of creatures great and small.