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

Visiting this cacophonous collection of vintage novelties is like stepping into the mind of a crazed toymaker.

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

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

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

A church dedicated to the Mexican skeleton saint.

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

The famous artist couple lived and worked here, in two different houses separated by a bridge.

66,000 pieces of art, donated by one of the world's richest men.

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

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

Part bookstore, part café, and part forest.

These azure waters were thought to lead to the Mayan Underworld.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.