These biodiverse university gardens form a green oasis amid the urban chaos of Mexico City.

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

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

Swarovski's museum/theme park is a fake diamond fantasia overlooked by a giant.

This splendid tomb may look fantastic, but there's nothing in it...