The hallucinogenic center of the ancient world.

The city-sized home palace of one of ancient Egypt's most powerful rulers gives us a rare look into the lives of the epoch's rulers.

A beautiful oasis town dating back to the Roman period still serves as reprieve from the brutal summer sun in Libya.

Landscape of bizarrely shaped desert mountains and innumerable rock carvings.

Climb down into the largest sinkhole in Qatar.

Nine limestone rock stacks on Australia's "Shipwreck Coast."

You'll find the little birds tucked within the rocks of this Australian beach.

An incredible garden taking over the interior of a massive sinkhole.

This Australian beach is composed of tiny shells.

This pair of Australian "waterfalls" appear to be falling straight across the land.

Alien rock formations grown from the sands of an Australian national park.

One of the best beaches in the entire world.

An opal mining town in the middle of Australia where people live, worship, and shop underground.

A tree planted by Marie Curie is treasured by the Radium institute that she set up.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

An unlikely hit, this museum is dedicated to the inventor of instant ramen and cup noodles.

Are they the remains of a fallen hotel, or the final stronghold for escaped Nazis?

The narrowest house in Buenos Aires is less than 10 feet wide.

Mysterious and ancient carved standing stones.

This tiny shop has been serving traditional tamales for more than 200 years.

These spectacular ruins were built by Spanish padres in the 17th century.

An underexplored, 130-foot tropical waterfall that you will have all to yourself.

The statue of a legendary giant who carried Christ and shouldered the world's sins.

A 100-plus-year-old mill transformed into a hotel and restaurant.