The United States' first transcontinental automobile road came to its end at this spot in San Francisco's Lincoln Park.

The site of the first couple's first kiss is commemorated by the most adorable presidential monument ever.

What was once the second largest steel mill in the US is now a sprawling complex of modern ruins.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

These museum grounds are a Dalai Lama-declared peace oasis.

A bronze statue of the famed Prussian naturalist commemorates the year he spent in Mexico.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

This covert museum showcases booties worn by a rescue dog and slippers owned by Queen Elizabeth II.

This clock was gifted to Mexico as a show of gratitude for its long history of welcoming Arab migrants.

Get a privileged view over Mexico City's Historic Center from a terrace right in its heart.

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

A scientific repository of goiters, boils and other ailments throughout Mexican history.

This foreboding building was the headquarters of the terrifying Spanish Inquisition in Mexico.

Diego Rivera hid various people and symbols in his first large-scale mural project.

The remains of an Aztec school and various intriguing artifacts lie below a modern cultural center.

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

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

These spectacular, symbolic serpents lie within the shadow of the Great Temple.

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

A fabulously bizarre surrealist sculpture by the late artist Leonora Carrington.

The ruins of the bathhouse used by the ill-fated last Aztec emperor still lie in Chapultepec Park.

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

The most complete statue of this Aztec god sits a top a throne carved with images of hallucinogenic plants.

This strange sculpture of a menacing skull surrounded by sun rays was discovered at the foot of the Pyramid of the Sun.