A replica of the Roman emperor in glorious full color.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

A windswept necropolis carved into the rocks overlooks the "most Portuguese town in Portugal."

This unassuming chapel in Portugal plays host to a ghoulish collection of bones.

Perhaps the most spectacular grotto along the Algarve coastline.

This small chapel is built of human bones and decorated with a golden skeleton.

"Portugal's Stonehenge" is made up of nut-like stones aligned with the heavens.

The "possessed" house that inspired "The Haunting in Connecticut" book and movie.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

A mysterious ancient cemetery with Roman sarcophagi and Lycian inscriptions.

The best-preserved ancient theater in the world.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

This hunter-gatherer architecture is believed to be the oldest religious complex known.

Frank Lloyd Wright died a year before construction on his largest public project even began.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

The last resting place of the famous Native American princess is marked by a haunting monument.

One of the oldest seagoing boats in the world can be found at the Dover Museum.

A medieval replica of King Arthur's legendary table, the Round Table hanging in Winchester Castle was decorated by Henry VIII.

Ask nicely, and stewards of a centuries-old charitable tradition will give you free bread and beer.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

Europe's largest prehistoric mound – burial site of a legendary king?