Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

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

Within the Saudi Arabian desert lies a 2,000-year-old ghost town made of stone and mud.

Site where Moses may have received the Ten Commandments.

This fortress sits atop a centuries-old well system.

In the Arabian Desert, a surreal rock formation stands cut clean in half.

Al Rahmah Mosque appears to "float" atop the Red Sea.

Prehistoric humans once used this sprawling lava tube network in the Saudi Arabian desert as shelter.

One of Mexico's least-visited archaeological sites is tucked away inside a theme park.

This now-abandoned shopping center in Playa del Carmen was built to resemble a medieval European castle.

An ancient system of freshwater caves filled with animal bones, including that of species long-extinct.

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

Alexander Hamilton, a founding father for the United States, was an immigrant and born on Nevis.

A mountain of conch shells created by centuries of fishermen.

A giant gun barrel in Barbados that once hoped to shoot outer space with science.

A roundabout in the West Indies that pays tribute to a bus driver who brokered no-nonsense on the school route.

Where Saint-Martin ends and Sint Maarten begins (or vice versa).

Tucked away past the island's famous stone arch, this hidden coastal path leads hikers to a dramatic razor sharp cliffside that thrusts into the Caribbean like the Doomed bow of the Titanic ocean liner.

Commercial airplanes land mere feet over the heads of sunbathing beachgoers on this tiny island.

A city continually buried under the ash of a volcano that has been erupting for more than 15 years.

A series of magical limestone formations along the coastline of the country island of Antigua.

This large stone off the coast of Martinique had a brief career in the Royal Navy.

This collection of historical artifacts and tropical wildlife waits just beneath the surface of the water.

The sister plane of the C-123 shot down during the Iran-Contra Affair has found a new purpose in retirement.