A bright little alley in La Boca is a part of tango history.

These small sculptures pay homage to the lovable star of an iconic Argentine comic strip.

Constructed on the ruins of a convent, this tower saved countless lives.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

The best place to send your postcards home from Antarctica.

The southernmost postal office in South America.

The most southern point you can drive to in the Western Hemisphere.

The actual “Hotel Rwanda” that became a hiding place and refuge from the horrors of genocide in 1994.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

The city of Parma's cathedral is home to one of the greatest illusionistic frescoes of the Renaissance.

This seven-sided Romanesque chapel is regarded as the oldest building in Rovinj.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

Carefully reconstructed after the Bosnian War, this 16th-century bridge stands as a symbol of the country's enduring multicultural heritage.

Bridge that died in war and was resurected.

An ancient knight and a symbol of the city's freedom.

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

The only known mosaic depicting the Greek god of sleep, Hypnos.

A naturally beautiful, seemingly bottomless deep blue spring.

A scenic UNESCO site that doubles as a habitat for various forms of wildlife.

In the hometown of the Catholic saint and Nobel Peace Prize winner, a memorial dedicated to her legacy.

A floating cat sanctuary on an Amsterdam canal.

Fourteen curious and controversial white bunnies sit in a circle near Newport Beach City Hall.

A relatively obscure antihero from the Marvel Comics universe adorns a wall inside Iceland's main airport.