This series of Scottish caves has no clear purpose other than baffling historians.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

Spend the night in this formerly abandoned traditional Scottish village.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

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

A 30-acre garden inspired by the principles of modern physics.

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

The fountain marks the area where hundreds of accused witches were burned at the stake.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

These fantastically named natural pools look like something out of a Scottish myth.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

These once-beautiful historic graveyards are set against the barren Virginia City hills.

A former mining hospital is now a vibrant artistic hub.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

Entering this curiosity shop is like stepping into a mad scientist's lab.

The seamy, underground secrets of Portland's criminal past.

Forever immortalized in concrete, this Simpsons etching was crafted by show creator Matt Groening.

This sandstone mansion was the home of two of Oregon's most important pioneers.