A sculpture serving as an homage to Pope John Paul II.

An ancient necropolis of magnificent tombs.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

A striking, menacing sandstone peak towering above a landscape that's equal parts Mordor and the Moon.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

The fifth-longest natural arch in the world, and the longest outside China.

A dazzling display of red rocks weathered into spires and hoodoos.

This water tower slanted at an uncomfortable angle off the old Route 66 was an ingenious marketing ploy.

Once in disrepair, this popular Texas stop along iconic Route 66 has been restored to its past glory.

Lines from a walking song are etched into a rock in Natural Bridge State Park.

An alternate history park where the Union Army loses the war... to dinosaurs.

This exceptionally well-preserved ancient marvel also houses a small museum dedicated to Jordanian folk tradition.

Where commuters walk through remnants of an ancient Greek necropolis.

A sharp sculpture made of thousands of pieces of jagged glass.

A fairy tale castle in modern Rome.

Architectureal fantasy quarter of Rome.

The secret medieval communication system will whisk your words above the noise of the crowd.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

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

A bathhouse from the second Islamic Caliphate decorated with frescoes of constellations, pleasure gardens, and naked ladies.

A 20-foot-tall egg painted in a traditional Czech patterns by the Czech community in Wilson, Kansas.

Massive still life just off the highway in Kansas.

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