Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

The largest open-air contemporary art center in Latin America is a unique experience in the Atlantic Forest.

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

The pedestrian traffic signals in Brazil's teeming metropolis light up with clues to nearby landmarks.

This giant mural of Santa Muerte in downtown São Paulo reminds passersby of their own mortality.

One of São Paulo's tight urban intersections has become a haven for graffiti artists ever since a single Batman started the trend.

The crypts are so large they're basically their own underground church.

A 125-meter long "tribute to the Brazilian people."

This massive Brazilian church is built like an angular, technicolor pyramid left by Mayans from the future.

Beautiful public park off the beaten path and away from tourists.

A grand entrance to one of the world's smallest Chinatowns.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

The modern birthplace of Irish freedom.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

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

This modest plaza in Moneygall, Ireland has cashed in on its distant connection to the U.S. president.

You can walk up Thailand’s naturally non-slip waterfall.

You'll find the little birds tucked within the rocks of this Australian beach.

A public urinal so pretty, it was declared a national monument.

One of the world's heaviest musical instruments towers within a popular urban park.

Metro station with a claim to rock n' roll fame.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Standing atop 2nd-century Roman ruins, this church is one of the oldest and most iconic in Old Cairo.