An entire town preserved as a historic landmark.

This beautiful ancient site is dotted with perforated sandstone pillars considered sacred by some Native American groups.

This amazingly preserved Gold Rush town is a historian's dream.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

This tiny island featuring 9th-century Viking ruins is only accessible at low tide.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

Vikings and Evangelicals have both had a hand in this replica medieval church.

This replica Viking village was created for a film that was never shot and is now open to visitors.

A perfectly circular stronghold constructed in the 10th century is now a nucleus of Viking culture housing a museum, village, and reenactment of an epic Viking battle.

This abandoned asylum in Wales might look haunted, but it's still beautiful.

Three bridges straddle a stream, one stacked upon the other.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

The atmospheric road was never meant to be so creepy.

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.

Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.

An unusual manor of stunning beauty, born out of a crippling disease.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

A rocky Irish outcropping with a history of wealth, conflict, and ruin.

This state park was once an important Native American cermonial center.

The ruins of a once massive plantation are now a private residence hidden in the Florida wilderness.