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

The meteor that sealed the fate of the dinosaurs landed at this site, one of the largest impact craters in the world.

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

A flooded Mexican cave that hides a river beneath the water.

A uniquely robust and historic look at Mexico's omnipresent dance with Death.

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

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

Part bookstore, part café, and part forest.

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

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

An Aztec snake god has taken the material form of an apartment complex.

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

Extraordinary sculpture garden created by an eccentric English poet.