The site of an ancient Mississippian settlement that appears to have flourished during the 10th to 13th centuries.

Hidden in magnificent rolling countryside, see what may be the largest modern stone circle in the world at Wisconsin's very own "Stonehenge”

This large midwestern cavern features impressive rock formations and an underground waterfall.

This long unused shot tower on the Mississippi remains a point of pride for a small city in Iowa.

The largest earthwork effigy in the world.

This ancient settlement contains some of the largest earthen mounds in North America.

Nestled amid the peaks and lochs of the Scottish Highlands, this inn and pub has played host to outlaws and ghosts.

A tumbling waterfall near a narrow passage that was used to herd cattle for hundreds of years.

A sculpture commemorating the "world's best mouser" in what is likely Scotland's longest-running distillery

This Neolithic stone circle is the most complete of its kind in Scotland.

This painting of a beloved dog will be on display at the Scottish National Gallery at long as the museum exists.

Scotland's first Masonic lodge may also be the oldest in the world.

This 15th-century structure had a long, tortuous journey to its current location.

An ornate "graveyard" for some of the country's forlorn building relics.

This 16th-century house tells the city's history through old artifacts and quirky tales.

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

Every birth, death, and marriage is recorded in these color-coded leather-bound books.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

Reportedly the "most handsome" market cross in Scotland.

A hidden tunnel leads to a medieval queen's shrine buried beneath a parking lot.

Did the legendary Scottish knight William Wallace actually take refuge here after a major battle?

Aside from denoting a public square or market, this medieval structure was also a sign of a town's prosperity.

A site of pagan worship which still attracts people looking for fairies.

The ruins of Scottish sea salt production.