The fishing boats that moor in this small lagoon enter and leave through a tunnel to the sea.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

A spiral staircase connects the limestone cave with Pembroke Castle, birthplace of King Henry VII.

A giant wooden soda bottle pays homage to a distinctly British drink on the very spot where it was invented.

Read a book with a glass of wine at this classically restored bar.

This semi-secret storybook hedge maze is also the oldest garden in the city.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A wildlife paradise, this island is one of the world’s most important habitats for burrow nesting seabirds.

A hermit's tiny cell built into the cliffside that saved him in South Pembrokeshire.

This lovely little burbling creek is actually a deadly waterway that has dragged down everyone who ever set foot in it.

A retirement home for soldiers that can trace its history to the Elizabethan era and beyond.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

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

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

This 13th century castle is chock full of ghosts and impossibly rare cows.

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 once-forgotten oasis in the middle of Lisbon was first created over a century ago quite by accident.

The best place in the world to buy tinned fish.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

The world's oldest bookshop still in operation.

Britain’s longest ancient monument, this great 8th century earthwork was built to mark the boundary between what would become England and Wales.

Centuries of human activity have forged an eerie landscape of ruins and craters on an exposed and windswept hilltop.