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

Meant to be one of the most extravagant hotels in the world, now an eerie, abandoned architectural gem in Mexico City.

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

A battle between nature and architecture in the Cambodian jungle.

5,000 skulls in memorial to those killed by the Khmer Rouge.

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

This singular art museum in São Paulo is unique inside and out.

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

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Eduardo Kobra’s breathtaking 32,300-square-foot graffiti wall took over Rio’s Olympic Boulevard.

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

This stunning Brazilian library contains the largest collection of Portuguese texts outside of Portugal itself.

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

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

A backdoor to Machu Picchu that only the most foolhardy infiltrator would attempt to breach.

An unexpected desert oasis in South America.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.