Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

This historical Netherlands fortress still bears the marks of its single siege.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

Rising from the sea like a stone monster.

Staves, storm-calling, and of course, necropants.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

This oceanside Reykjavik spot is speckled with recycled sculptures and large stones.

This tiny museum's sizable collection is jammed into a former underground public toilet.

Learn about Iceland's hidden folk at this school dedicated to the study of elves.

An encyclopedic collection of mammal penises.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

Modern megaliths form this work of cosmic, Celtic landscape art.

A 13th-century stronghold that has fallen into ruin.

Scotland's oldest medieval bridge is also among the last reminders of early medieval Aberdeen.

Possibly the oldest living thing in Europe, more likely a pagan survivor.

This Birnam-based garden honors the legacy of 19th-century children’s book author Beatrix Potter.

Described by William Wordsworth as a "World of Wonder."

More than a century old, this cast iron bridge on the Balmoral Estate leads to nowhere.

This Scottish castle has witnessed clan rivalries, Jacobite uprisings, whisky smuggling, and more.

A glacial pothole was once a hideout for a notorious Scottish outlaw.

A private home envelops the ruins of this 13th-century priory.

Also known as "Robin Hood's tree," this tree became a famed location along Hadrian's Wall before it was cut down in an act of vandalism.

An 18th-century viewpoint across the surrounding highlands.