The conquistador's former fortress is the oldest preserved colonial building in the Americas.

When struck, the strange stones in this park ring like bells.

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

A fairy garden in an old hotel hidden in La Marquesa forest.

Three sinkholes filled with warm, crystal-clear water reached by a horse-driven cart on an old train track through the jungle.

One of the few places where you can visit a cenote and Maya ruins at the same time.

This "cursed house" features secret rooms, hidden vaults, and dark escape tunnels.

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

Beach instrument turned bed and breakfast.

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

Stained glass windows bathe this botanical garden in cosmic light.

At least seven hues of blue and turquoise make this freshwater lagoon unique.

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

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

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

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

The winter home of millions of migrating monarch butterflies.

Underwater art project will double as a massive artificial coral reef to help regenerate the damaged ecosystem.

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

Every equinox this Maya pyramid puts on a spooky ancient light show.

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

Extraordinary sculpture garden created by an eccentric English poet.

Part bookstore, part café, and part forest.

Frida Kahlo's childhood home, now a museum of her life and works.