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

Also known as “Robin Hood’s tree,” it became a famed location along Hadrian's Wall before it was cut down.

This medieval manor house was hastily fortified when it found itself in the middle of the Scottish fight for independence.

A rather grand, but tiny, folly on the banks of the River Wear associated with a Polish count.

This tribute to Sunderland's mining past stands outside the home of its football club.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

One man and his wife have turned a barren Korean island into a fantastical botanical wonderland.

This temple was constructed entirely by Roman soldiers.

The world’s oldest surviving single-arch railway bridge.

Built in 1911, the Tees Transporter Bridge is one of only six transporter bridges still in operation.

South Korea's largely symbolic, barely used gateway to the North.

The best place for scenic views of the DMZ and North Korea.

The site of many tense prisoner exchanges across the Military Demarcation Line between North and South Korea.

Generations have refused to move this doll from its dusty resting place to preserve a castle from a watery fate.

This ingenious engineering solution was built to stop the "theft" of canal water.

The house in the middle of the motorway.

The world's largest military aircraft cemetery.

A locomotive made from 185,000 bricks celebrates the town's pioneering railway history.

Public art now takes pride of place on the site of one of County Durham's last deep coal mines.

This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.

Preserved "bog person" that is over 2,000 years old.

Four alabaster giants contemplate the tides on the shore of Denmark.

This museum is a portal to 20th-century Denmark.

A model memorial to the original Odin Tower, the second highest tower in Europe before it was sabotaged by Danish Nazis.