A spiritual vortex among the red rocks in Sedona.

The first full-scale tunnel built in America is short but scenic.

A tunnel with windows, so you don't miss out on the impressive views.

An underground magnet for ever-changing street art.

Las Vegas's very own 40-foot-tall fire-spewing praying mantis.

A sharp bend in a dramatic river canyon cut through red rocks.

This sprawling, formerly elite sporting complex in Amman, Jordan has become a local picnic spot.

Gladiators battle and chariots race daily in the ruins of a once-great Roman city.

The most gigantic, swoony, intimidating trio of fingers in all of antiquity.

An ancient capital city that dates back 3,000 years and harbors many surprises.

A "miracle" that seems to produce more holy fistfights than holy revelations.

This family tattoo parlor has been inking religious pilgrims in the Middle East for 700 years.

Slum Settlement Filled With Mountains of Garbage.

The massive cave church of Cairo's Zabbaleen community is one of the largest Christian churches in the Middle East.

This vast masterpiece of Moroccan architecture spreads across 20 acres.

The largest madrasa in Morocco once housed more than 900 students within its exquisite walls.

The courtyard of this small Marinid madrasa is a dazzling example of intricate Islamic architecture.

This former royal palace with gorgeous gardens became the first museum in Morocco.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

The oldest known university in the world is in Fez, Morocco.

Traditional 11th-century outdoor tannery.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

The other side is actually green.