This beautifully deceptive waterfall is something far different from what it appears to be.

The winter home of millions of migrating monarch butterflies.

Twelve natural mummies are displayed in the crypt of this former monastery school.

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

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.

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

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

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

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

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

An island filled with hundreds of hanging, decomposing, decapitated dolls.

A memorial to the tens of thousands of Irish who fled to North America during the Great Famine.

A Canadian POW for German soldiers during WWII where prisoners hatched an elaborate escape plan.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

The entire length of the border is marked by a 20-foot-wide slash through the trees.

Hauntingly beautiful totem poles left by the Haida.

Little island known for its massive beachfront "flowerpot" pillars.

Fossils, railroads, and waterfalls!

With well over 130 falls and cascades to brag about, Hamilton, Ontario has earned its stripes as the waterfall capital of the world.

An ancient Viking village in North America that predates Columbus by 500 years.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

Enjoy an overnight at an old haunted B&B site of the Borden family murders.