The largest hewn stone in history.

Ruins of the Crusaders' headquarters.

Mysterious lost empire of the Silk Road.

Also known as the Great Mosque of Damascus, this is one of the world's largest and oldest mosques.

Amid the rubble of Aleppo's Old Quarter, part of a historic market has been restored and re-opened.

One of the oldest and largest castles in the world.

One of the world's largest tanks mimics the experience of watching rare whale sharks, giant rays, and deep sea creatures from the ocean floor.

The world's largest permanent architectural projection display entertains audiences nightly with 28-story light shows.

Japan's first train station is also the site of Godzilla's first destructive visit to the nation.

Once a black market electronics marketplace, now an otaku shopper's paradise.

Not quite the menace it once was, this monster still has some chops.

The 10,000 Torii shrine.

This 700-year-old street food market features baby octopus and soy donuts.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

Road signs in Namibia mark the location of one of the five major circles of latitude.

A rare cluster of alien-like plants grows along a dusty highway.

A desert that rolls right up to the ocean, where it's so dry animals live off the fog.

This "dead marsh" sits among the largest sand dunes in the world, a forest frozen in time.

The largest prehistoric ruins south of the Sahara, once a powerful center of international trade.

Spanning over 10,000 square miles, this ancient salt pan is one of the largest on the planet.

There is only one place in the world where the corners of four nations come together.

An enchanting rocky island of scraggly baobabs surrounded by an ancient sea and sprawling salt pans.

Mined to a depth of 240 meters with a perimeter of about 1.6 km, the largest hand-dug excavation in the world.

This small island off Lambert's Bay is home to more than 2,000 Cape gannets and is the only such breeding colony open to the public.