An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

A 500-year-old series of tunnels long believed to be folkloric was uncovered beneath the streets of Puebla.

The first public library in the Americas has more than 45,000 books dating back to the 15th century.

The splendor of this 17th century golden chapel has led it to be called the "eighth wonder of the world."

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

A legendary music collector donated his entire collection to the entire city of Memphis.

Mass graves and Victorian monuments mark the history of Memphis in this 19th century cemetery.

This homegrown adoption center offers a wonderland of feline companionship.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

An abandoned town is hidden in Great Smoky Mountains National Park.

A small building that loosely resembles a tooth is appropriately used as a dentist office.

This simple rock stands as a memorial of the major student protests of 1968.

An abstract sculpture memorializing a student massacre that took place in 1971.

This mosaic made out of books represents one of Colonial Mexico's most important literary figures.

Sample sweets at an Art Nouveau candy shop that's been in business since 1874.

Founded by a Basque immigrant, Mexico City's oldest bakery has a history dating back to 1870.

Shop for superb tortillas at this homage to the ancient art of nixtamalization.

The entrance to an early 20th-century cultural center features murals that deal with the cultural fusion that characterizes Mexico.

The outside of this theater is decorated with a Diego Rivera mural that explores the history of Mexico.

Inside the cloister of the Temple of San Juan Bautista is a ceiling decorated with gold Baroque illustrations.

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

In 2008, this Mexico City metro station was the site of an hours-long fight between emo, punk, and goth groups.

This museum dedicated to cartography is housed in a former 17th-century convent.