A castle in the Scottish Highlands has been continuously inhabited since the 1300s.

The ruins of a defunct limestone quarry still haunt this Scottish promontory.

Where the sleeping monsters of Scotland's oil industry are left to rust.

Scattered throughout London are ancient remnants of the city's former bounding wall.

An architectural oddity hides in plain sight on this iconic London bridge.

Cairns built to bring travelers good luck stretch across the land like miniature stone mountains.

This beautiful, historic church looks like something out of a simpler past.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

This stunning concert hall has become a symbol of Iceland's national recovery.

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

Three columns of volcanic rock shoot out of the ocean.

Every summer local children form "pysja patrols" to save young birds that have wandered from their nests.

The largest whale museum in Europe allows visitors to walk among life-size giants.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

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

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

Medicinal spa created with the discharge from a geothermal energy plant.

A kaleidoscopic warehouse-maze of handmade neon signs.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

This restaurant was removed from the famed sister ship of the Titanic and placed within a hotel.

The second-longest pier in the U.K. stretches a whole kilometer into the Irish Sea.

A headstone notes where the most famous of Robin Hood's legendary Merry Men is reportedly buried.