See massive fossils that are over 200 million years old in northeastern Arizona.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Go inside to really appreciate this 500-year-old technological masterpiece.

A little sculpture with a large wardrobe.

Follow the original medieval paths that wind through this intriguing section of the city.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

Something's missing between the arcades of the Palazzo della Ragione in "the city of the three withouts."

The tomb of the mythological founder of Padua is not hidden in some obscure crypt, but stands right in the middle of the city square.

Deceased nuns were placed on stone chairs to decompose, while the surviving nuns prayed near the lifeless bodies.

A mysterious ancient elephant said to possess magic powers is now the symbol of a Sicilian city.

This 6th-century church has the largest and best-preserved collection of Byzantine mosaics outside Constantinople.

One of the world's tallest statues is also one of its most hated.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

Legend says lovers who hold hands while venturing along this stone jetty and kiss at the end will remain together forever.

Monumental sculptures guard many of the graves, transforming this necropolis into an open-air fine art museum.

This tallest folly in the world began its life as an elaborate factory chimney.

This Georgian architectural masterpiece is the only cloth hall left in Britain.

An old drug store full of mortars and pestles, pill-making machines, and medicines reputed to cure most any illness.

The oldest housing complex in Riga is a mini timeline of architectural trends.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

At this rare mosque in Tbilisi, Sunni and Shia Muslims pray side by side.

The mile-long pier stretches from a ruined fortress out into the Baltic.

A small but hugely whimsical theater where marionettes play out the "The Battle of Stalingrad."