In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

A magnificent collection of imperial armor and weaponry.

Apartment complexes built into huge repurposed natural gas tanks.

Handsomely crafted representations of our round planet.

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

A sculpture of the beloved author surrounded by characters from his fairy tales.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

A battle between nature and architecture in the Cambodian jungle.

Combination beer garden and music venue in the heart of Wicker Park.

An antiquated German apothecary on Chicago's North Side.

Huge abstract sculptures of the Puerto Rican Flag.