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

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

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

2300-year-old Roman road connecting the empire.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

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

The middle finger of modernity.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

This beautiful, historic church looks like something out of a simpler past.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

An encyclopedic collection of mammal penises.

A serene space tucked amid the skyscrapers of Hong Kong's bustling financial district.

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

A marvel of Byzantine engineering under the streets of Istanbul.

Ancient serpentine sacrifice holder that has stood the test of time.

This public art piece proves that in Portland even reporting the weather is a thing of whimsy.

The magic's in the hole!

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

Climb to the top of the world's largest seated bronze Buddha.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

Macabre astrological automaton clock dating to the late 1400s.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.