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

The development of this cliffside waterpark is representative of Mexico's history of co-op tourism developments.

Beach instrument turned bed and breakfast.

Inside this mountain lies several kilometers of breathtaking caves.

This incredible college library is a visual masterpiece of mosaic art. It also looks kind of like a giant boombox.

The ruins of an ancient temple to the Aztec wind god discovered in the middle of a metro station.

Stained glass windows bathe this botanical garden in cosmic light.

The singular ruins of a mysterious lost city.

A dark tunnel leads to a striking white crater that seems to be from another planet.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

The jewel of western Mexico's archaeological legacy is this tiered circular pyramid now covered in grass.

The burial place of some of Mexico's most prominent residents is full of macabre stories and hidden masonic symbols.

The ruins of an ancient Mayan city, beautifully preserved and only accessible by boat.

If you can look past the nearby sewer pipes, this urban sinkhole grotto is a mini-paradise.

Two waterfalls flow down the cliff faces decorated with rare natural basalt columns.

These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

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

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

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

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

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

This fantastical house shaped like a seashell brings aquatic design to architecture.

High atop a Mexican rainforest mountain, this ancient pyramid once drew pilgrims countries away.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.