This Austrian museum celebrates the work of famous forgers and their inimitable imitations.

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

A spherical "micro-nation" in the heart of Vienna.

The topiary maze at the Habsburg hunting lodge.

This former insane asylum now holds a pathological anatomy museum.

Macabre museum devoted to historical Viennese murders.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

The final resting place for the remains of 143 Habsburg royalty.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Complete town of 5,000 living out at sea on the world's first offshore oil platform.

Eastern Bloc nostalgia, anybody?

An IT-specialist-turned-farmer reintroduces an Austrian food tradition while promoting snails as a sustainable "future food" option.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

Known as the Hintz House, this medieval pharmacy has been an apothecary's haven for nearly 450 years.

The Natural History Museum that time forgot.

Packed to the ceiling with antique taxidermy and hunting arms.

A stunning 18th century pharmacy and medieval chemist's collection.

Something's watching you.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

The largest Roman amphitheater in the Balkans once held over 20,000 people, but managed to lay hidden for hundreds of years.

Bronzes and busts that once stood in the city's main squares are now relegated to a small hidden courtyard.

The elliptical citadel resisted the advance of the mighty Ottomans several times, thanks to the military prowess of the "Dragon of Albania."