A beautiful mountaintop mausoleum devoted to a Montenegrin icon can't seem to make everyone happy.

A tiny church on a man-made island in the Adriatic.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

A number of craters left by fatal mortar strikes have been filled with red resin to remember those lost during the Siege of Sarajevo.

Oriental bazaar in the heart of Sarajevo.

A war-torn Olympic relic is being overtaken by graffiti and nature.

This museum promotes informed contraception by documenting its often secret past.

What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

Mexico's first public cable car soars over the congested streets outside Mexico City.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

This man-made mound monument was built out of soil from all across the Polish empire.

The unsettling remnants of a torn down movie set lies nearby the ruined location of the actual Płaszów Labor Camp.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

Floating swimming pool within a moored vessel.

Where once there was a train station bathroom, there is now this German burger joint.

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

Berlin's old airport.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

A surreal museum of extraordinary industrial objects.

An old department store turned Nazi prison turned artist commune.