A lush oasis full of vibrant plants and striking geometric displays.

This glass skywalk offers vertiginous views down the volcanic cliffs to the beach below.

Men in rubber-soled boots serve as your "brakes" on this toboggan ride Hemingway described as "exhilarating."

These small, triangular, colorful houses are a staple of Madeira Island.

Modern technology and live displays tell the story of the Pacific during WWII for the Internet generation.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

A place where the laws of nature seem to have gone completely berserk... but of course haven't.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

More than 2,000 species of tropical plants call this nature preserve and sanctuary home.

Watch the newest land on the planet form before your eyes.

These ancient sacred grounds granted amnesty to those who managed to reach them.

A priest with no formal artistic training used basic house paint to create gorgeous religious scenes inside this historic church.

This unusual lava tube spouts seawater during high surf.

Get up close and personal with these majestic fish.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

This small fort played a huge role defending Puerto Rico’s capital city.

On a clear day, you can see all the way to the Virgin Islands from the top of this observation tower built in the 1960s.

The capital of the Cayman Islands is a center of offshore banking, but gets battered by blistering hurricanes.

Send a postcard while vacationing with Satan.

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

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

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