Native Americans built this circle of stones, which was used to predict astronomical events.

The remote outlaw hideout of Jesse James, Butch Cassidy, and the Sundance Kid.

This monument remembers one of the manliest men of the frontier who fought a grizzly before dragging himself 200 miles to safety.

"...I guess that was your accomplice in the wood chipper?"

These former Cold War launch sites have been preserved for tourists to see where the button might have been pushed.

Yes, this monument is aware that it is about 20 miles away from the actual center of the United States.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

This replica stave church looks like a piece of Norway was simply plopped down in South Dakota.

South Dakota's oldest operating brewery is housed inside a historic firehouse.

The remains of a enormous earthen figure of unknown origins cuts across a rural Wisconsin road.

Behemoth, cannon-like telescope operated by generations of Irish earls.

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

An 1814 castle that hosts an exhibit of "explorabilia".

A remarkably intact castle that once was the largest in Ireland.

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

The oldest pub in Ireland may also be the oldest surviving bar in the entire world.

The ruins of an 800-year-old monastery boasts the tallest round tower in Ireland.

This 30-foot pile of rocks may be the grave of a mythological Irish queen.

An outstanding and haunting glimpse of the horrors of the Great Famine of Ireland.

A six-ton wedding present for the King of the Scots.

This cramped crevasse saw the entire population of its island suffocated inside its depths.

Overlooking a Scottish loch, this beautifully crumbling castle once inspired a poem by William Wordsworth.

A Scottish manor with a history of mysterious fires, magic, and eccentric tales