The now-quiet remains of coastal artillery defenses that were used in both World Wars.

This astronomical clock is the second oldest in England.

This site contains overlapping ancient graveyards that existed about 1,000 years apart.

This hill and tower are steeped in legend, from King Arthur to the Holy Grail.

The Great Fire of London and the regulation of one-way streets both started in this alley.

This Underground station has been a popular filming location for decades, even before it closed.

Death hangs in the air here, where a 17th-century gibbet has been erected on a Neolithic tomb.

This may be the smallest length of railway in the United Kingdom.

Fascinating town where normal life interfaces with the occult.

The only pub in the world surrounded by an ancient stone circle.

A hands-off space for graffiti artists to hone and display their skills.

Giant, friendly pelicans in Central London, the most unlikely of places.

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

This bewitching Babylonian goddess haunts a hallway of the British Museum.

Catacombs turned marketplace.

This amazing trail among the many waterfalls around Ingleton has been enchanting visitors since 1885.

The history of this famed tree ranges from an 18th-century highway robber, to the Scout Association.

This demon atop the Notre-Dame de Paris looks utterly bored.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The real life town from the Pied Piper of Hamelin has a mechanical puppet show that retells the famous story many times a day.

A Dutch clog company in the town of Zaandam loves the wooden shoes so much it made a museum for them.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.