During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

A huge musical instrument played by the ocean.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Abandoned figurines adorn a small plot on the side of a craft market's entrance.

Shocking dioramas of human torture, meant to promote human rights awareness.

A gargantuan crystal kingdom.

For decades, the parade of apostles that left the Expiatory Temple of Guadalajara remained hidden inside one of the towers.

Oaxaca's recently restored "forgotten Dominican convent."

This small church is surrounded by a landscape filled with hidden Zapotec ruins.

A sprawling network of century-old subterranean catacombs lies beneath a nondescript suburban home.

A beautiful example of 18th-century engineering still standing tall.

A place to learn about the history and culture of Mexico's largest Anabaptist group.

The walls and ceilings of the "Mexican Sistine Chapel" are almost completely covered with mural, sculpture, inscriptions and oil paintings.

This metal church may or may not have been designed by Alexandre-Gustave Eiffel.

These millennia-old murals once covered the walls of residential complexes across the ancient city.

This former 17th-century church now houses a university's public library along with several mural masterworks.

This masterpiece of muralism depicts the rich culture of the people of Michoacán and their timeless connection to the land.

After a partial collapse in the 1950s, this small church's historic facade lives on.

A museum built around the site where the most controversial human remains in the country were found.

This one-of-a-kind convent boasts a kaleidoscopic exterior of stars and double-headed eagles.

This centuries-old mine remained hidden beneath a hotel bar until 2013.

Monumental paintings, discovered in a Mexican cathedral in 1957, depict the deaths of some friars in Japan.

This lonely tower survived the landslide that devastated much of a Mexican mining town.

Located in the shadow of a volcano, this church is tied to the culture of the Purépecha people.