An unusual and beautiful form of mass transit serves the city's steepest neighborhoods.

This city park wants you to take your shoes off.

In the heart of Medellín, an artsy urban complex sets the stage for demonstrations and protests.

Three hundred illuminated pillars form an “artificial forest” in Medellín.

Home to 23 voluptuous and instantly lovable sculptures by one of Latin America's most celebrated artists.

Two identical statues by Fernando Botero, one blown to pieces in a terrorist bombing, the other donated as a gift for peace.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

Every equinox this Maya pyramid puts on a spooky ancient light show.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

One of Mexico's youngest major cities still holds on to this structure representing its short modern history.

Located outside Medellín, this Colombian park focuses on conservation and sustainability.

A 10 million-ton rock once worshiped by the Tahamies Indians, accessed by an astounding staircase.

The Andean town where every single building is decorated with a brightly colored frieze.

Inside the cloister of the Temple of San Juan Bautista is a ceiling decorated with gold Baroque illustrations.

In Coyoacán, a pair of coyotes crown a public fountain in reference to the ancient Aztec name of the borough.

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

Beggars were miraculously "cured" of their fake ailments when they returned home to this 17th century Paris slum each night.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

A poem by Arthur Rimbaud is inscribed on the wall of a street that, while it is only one block long, plays a key role in multiple novels.

This 18th-century sundial was designed to calculate the date of Easter each year.

An unusual number plate signifies the building's saucy past.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

Pitié-Salpêtrière was the dumping grounds for women who received the dreaded diagnosis of "hysterical."