This series of Scottish caves has no clear purpose other than baffling historians.

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.

This cluttered cantina is famed for its cheese-spiked, raisin-flavored liqueur.

The hot chocolate here all stems from small, sustainable microproducers in Chiapas and Tabasco.

This tiny garden was built specifically to provide a place of peace and serenity away from the busy city streets.

After becoming locally extinct, this esteemed avian now flies free in the forests around the ancient ruins.

The enigmatic skull gazes out over the ruins of a once-great Mayan city.

This pre-Hispanic apartment complex also includes ancestral paintings that point to its military past.

A striking depiction of Teotihuacan's mysterious "Spider Woman."

Dating back to the second century, vestiges of prehispanic mural paintings are found in this underground palace.

Cool down and fill up after visiting Teotihuacán at this bar and restaurant in a deep, underground cave.

This tiny, tucked-away eatery reflects the history of Mexico's Lebanese immigrants.

Its exhibits are dedicated to educating the public about state terrorism in Mexico.

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

This one-window stand has been home to a giant vat of slowly simmering meats and an array of unique tacos for almost 50 years.

This French cemetery houses some of the most exquisite examples of funerary art in Mexico City.

What was once a trend-setting, phrase-coining icon of architectural splendor is now a rotting, forgotten hulk.

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

The remains of a deserted 1800s farming community can be found in Little River State Park.

This 38-drawer structure claims the superlative title, but it isn't the world's only giant filing cabinet.

The now-public home of a renowned art collector is full of unique pieces from viceregal and 19th-century Mexico.

Cryptid lake monster honored with its own monument.

This preserved wilderness hides the remains of a colonial grain mill used to feed George Washington's troops.