This modern monument to pagan belief looks like it was transported straight from ancient times.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Da Vinci's equestrian statue, 500 years in the making.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

A huge enchanting public park just outside the ancient walls of Rome.

Small on the outside, big on the inside, this church is an astonishing act of visual deception.

100 year tradition of fist fights, marked by marble footsteps.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

Erotic art covers the walls of the largest ancient pleasure palace.

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

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The glowing blue Nymphaeum of Emperor Tiberius.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

This concrete residential area doubles as an open-air gallery.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

The most visited, and possibly most controversial, museum in Germany.

Partially submerged Buddha heads freckle Chicago’s neighborhoods.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

G.V. Black, the Father of Modern Dentistry, keeps an eternal eye on Chicagoan’s teeth from his perch in Lincoln Park.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

These chunky stone towers out in Lake Michigan are the key to Chicago’s drinking water.