This "City of Books" holds a museum, library, and the complete personal book collections of five of Mexico's greatest thinkers.

The humble tomb of an Argentine general, hand-built by his son using stones brought down from the Andes.

A beautiful young girl said to have been buried alive in her coffin…

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

Alexander Hamilton’s creation caused quite a bit of controversy.

This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Albuquerque found the perfect use for tumbleweeds at Christmastime.

Historic beer hall in Bucharest with magnificent stained glass and a lively folk band.

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

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

Historic medieval fortified city in southwest France.

Vast stretch of tide-pools with a unique Moroccan charm.

A black cat protests the City Guild in Riga's Old Town.

Flamboyant architecture from the turn of 20th century.

The oldest housing complex in Riga is a mini timeline of architectural trends.

3,000 market stands in five former Zeppelin hangars.

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.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

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