Two geologically young and nearly circular volcanic subsidence craters, each about a half-mile in diameter, abruptly break the nearly featureless Snake River Plain.

An impressive waterfall nestled in the cliffs of Idaho's Snake River Canyon.

From here, the loch appears to take the shape of mainland Scotland.

Inside a Scottish castle hangs the tattered remains of a flag with murky origins and supposed magic powers.

A red sandstone freestanding monolith rises out of the sea in northern Scotland.

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

Thanks to both terrific preservation and historic vandalism this ancient site is known as the "Heart of Neolithic Orkney."

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

This Roman relic was discovered in Scotland by a mudlarking ferryman.

This cannonball embedded in the side of an Edinburgh house once served a surprisingly pedestrian purpose.

These quaint cottages feature built-in signaling devices for fishermen.

More stones than Stonehenge, all scattered within a windswept landscape sure to enchant 'Outlander' fans.

An unusually shaped lighthouse with origins rooted in heartbreak.

This 1,300-year-old marker is one of the finest and most complete early Christian crosses in Scotland.

If you can’t dive into a whisky cask, this swimming pool might be the next best thing. 

It's said taking a hammer and nail to this stone relieves a toothache.

A nature and cultural preserve named for its multitude of petroglyphs carved by the Northern Sinagua people.

This single-track road rewards brave drivers with stunning Scottish scenery.

A small side chapel in Santa Fe's basilica is home to the oldest statute of the Virgin Mary in North America.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Dramatic river bend surrounds a natural red-rocked pedestal.

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