Commemorating the spot where the famous scientist fed his pigeons.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

Cheap pizza and all of your naughty bedroom needs housed in a stunning example of Art Nouveau architecture.

Need to book a room at the Hotel Pennsylvania? Just dial up 6-5000.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

A grand New York post office that is home to mailman Santas, scraps of postal history, and a pneumatic mail system.

Manhattan's deadly West Side railroad, which killed hundreds of New Yorkers, is remembered by this simple plaque.

The home of one of America's most beloved fictional characters has become a real world landmark.

This New York holdover was built to provide housing for shopgirls and still does not allow men above the lobby.

The colonial city's social history is reflected in its fanciful door knockers.

This elegant Colombian fortress was one of the torture headquarters for the Spanish Inquisition.

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.

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

A museum of memories in what was once one of the most violent cities in the world.

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

Outdoor escalators and art have helped change what was once a notoriously dangerous part of Medellín.

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

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

Ripped apart by a bomb in 1993, the shell of Pablo Escobar's infamous vacation house still stands.

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

One of the largest bamboo bridges in Asia, located right next to a bamboo school.

Isolated atop this Balinese sea crag is a lovely Hindu temple that is said to be guarded by sea snakes.

The name of this ancient Indonesian temple translates as "Elephant Cave" but it could be more accurately called "The Hellmouth."