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

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

An open-air "garden" of mural art that changes weekly.

An abandoned, desolate train tunnel that was used during World War II.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

These ruins witnessed the final gathering of the failed Jacobite Rebellion.

Built to hold the worst of the worst of the Nazi war prisoners.

This castle was established by the 4th Duke of Montrose and is connected to the Buchanan Clan.

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

A monument to the thousands of Canadian soldiers who died capturing the French ridge during World War I.

One of the most spectacular 18th-century bridges in Scotland.

In the Scottish Highlands, this 13th-century castle ruin is hidden at the end of a farm track.

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

This single-track road rewards brave drivers with stunning Scottish scenery.

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

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

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

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