The museum houses "the most studied meteorite in history," among other geological oddities.

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

This old-school café is famous for serving coffee, chilaquiles, and the Cuban Revolution.

Half curiosity cabinet, half late night hotspot, this Brazilian bar is helping turn a dangerous neighborhood around.

This mesmerizing statue of a child wrestling an anteater symbolizes the native culture and biodiversity of São Paulo.

The bookstore with bookshelves built into unlikely places.

A small town hallucinates en masse - Bad bread, or CIA science project?

A medieval church with largest and oldest collection of Renaissance frescoes in France.

The world's tallest bridge is also possibly the most elegant.

The world's most famous cheese caves.

A fiery-red region of scooped out land still largely untouched by civilization, tourists or otherwise.

The streets of a sleepy Spanish town proudly exhibit some of the world's finest graffiti.

A beautiful but toxic fountain of mercury.

Hidden well off the beaten path in Catalonia is this crumbling medieval castle that is slowly being covered in graffiti.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

In the back of a nondescript sports bar is a museum-worthy mural by legendary cartoonists.

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

Ride the subways of yesteryear.

A unique Holocaust memorial tells the personal stories of the Jewish residents exiled from greater Berlin.

Berlin's old airport.

From toys to kettles to scientific instruments, this German museum celebrates the beauty of 20th century design.

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

A collection of abandoned typographic signs from Berlin and beyond.