One of Mexico's least-visited archaeological sites is tucked away inside a theme park.

A colossal statue with a controversial past, forgotten for more than 30 years.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

The F1 Mexican Grand Prix circuit goes right through the middle of this old baseball stadium.

Many people don't realize there’s a lot going on in—and below—the world’s tallest triumphal arch.

By night, this auto repair shop turns into a taquería serving up some of the city's finest al pastor tacos.

The only castle in North America to ever house European sovereigns.

Frida Kahlo's childhood home, now a museum of her life and works.

This plaza at the end of the world teems with monumental tributes to a problematic history, and laser discs.

It took 82 years and four different plaques to finally get the story right.

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

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

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

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.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

This stone complex marks the urban center of a lost civilization.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Giant, friendly pelicans in Central London, the most unlikely of places.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

Catacombs turned marketplace.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Colombia's first concrete structure doubles as a replica of Versaille's Petit Trianon Belvedere and a symbol for development.