One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

A lush oasis full of vibrant plants and striking geometric displays.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

A famous pilgrimage site that remains hidden in the midst of a city.

This magnificent arch is all that remains of a former smelt mill.

Only the headframes remain from this mining operation, once one of the largest in the region.

An iconic waterwheel in the Pennine Hills marks the location of one of Britain’s most profitable lead mines.

This enormous secondhand bookstore inside a Victorian train station sparked the "Keep Calm and Carry On" craze.

The sign at the garden gate reads: "These Plants Can Kill."

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

These upturned herring boats make nifty storage sheds for fishing goods.

This temple was constructed entirely by Roman soldiers.

Twice a day this ancient path disappears with the tides, leaving the Holy Island of Lindisfarne out to sea.

The "Bridge Over the Atlantic" lets you cross the waterway in mere seconds.

A poignant memorial shows the widows and children left heartbroken by the worst fishing disaster in Scottish history.

There were once more than five stones in this ancient monument.

One of four sister bronze sculptures dedicated to the widows and orphans of an 1881 tragedy.

Looking strangely like Rome's Colosseum, this unfinished tower has dominated the skyline for over 100 years.

This castle resides in a valley known for immense bloodshed during the Middle Ages.

This collection of Neolithic monuments make up one of The U.K.'s richest archeological landscapes.

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

This Neolithic-era complex boasts standing stones, a cairn, and the only henge in Western Scotland.

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