One of Monterrey's oldest buildings is perched atop a hill boasting impressive views of the city.

A mysterious, ancient collection of pre-Hispanic petroglyphs hidden deep in the Mexican desert.

Half-hidden by grassy slopes, this striking Spanish colonial fort is now a museum of underwater archaeology.

These subterranean models show Mexico City's central square during three different eras.

This museum houses two of Mexico's most impressive Aztec monoliths.

This partially reconstructed Aztec pyramid gives a glimpse of what its larger counterparts would have looked like.

Come face to face with the ferocious visage of the serpent-headed mother goddess of the Aztecs.

Once home to an aristocratic family and a workers' organization, this intricately tiled building now houses a chain restaurant.

Mexico's largest collection of masks is found in the ruins of an abandoned convent.

This colossal ancient sculpture of the monstrous Aztec rain god has a literally stormy history.

Many people don't realize there’s a lot going on in—and below—the world’s tallest triumphal arch.

Inside this mountain lies several kilometers of breathtaking caves.

A Lovecraftian altar of nightmarish bronze chairs sits ominously on a boardwalk in Puerto Vallarta.

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

The largest cave shaft in the world is home to thousands of birds and popular with BASE jumpers.

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

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

Part bookstore, part café, and part forest.

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