This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

One of only two commuter aerial tramways in the United States.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

Elevated freight railway turned wildly successful urban park.

Try not to get slimed in Tribeca.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

A crumbling hospital from the 1850s on Roosevelt Island.

One of Monterrey's oldest buildings is perched atop a hill boasting impressive views of the city.

This immense scene of a cosmic battle between a jaguar and serpent illustrates the Aztec concept of the duality of life.

The collection of intricate sculptures includes one carved from a mammoth's tusk

This stunning and ethereal mural symbolizes the beauty, unity, and diversity of humankind.

A close look at the church's walls reveals pieces of Mexico's history.

This museum houses two of Mexico's most impressive Aztec monoliths.

A bullet-scarred monastery chronicles Mexico's turbulent history of foreign invasions.

The official Presidential Residence of Los Pinos became an emblem of Mexico's opulence and presidential corruption.

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

Hidden for more than a century, the grave of the Conquistador remains forgotten behind these church walls.

It's believed this golden brick is part of the legendary lost Aztec treasure.

The underground mall's skylights look like they could be part of a spaceship.

Come face to face with the ferocious visage of the serpent-headed mother goddess of the Aztecs.

This colossal ancient jaguar sculpture was used as a vessel for the hearts torn from sacrificial victims.

Once home to an aristocratic family and a workers' organization, this intricately tiled building now houses a chain restaurant.