Abandoned railway line circling the city of Paris.

France's most famous cemetery, with some of its most curious tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The world's tallest bridge is also possibly the most elegant.

Historic medieval fortified city in southwest France.

The unusual stilted beacon is the town's only active lighthouse.

A dark Victorian well house now plays host to mystical waters and pagan shrines.

The metal frame is all that's left of a wicker sculpture which once towered over the M5 motorway.

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

A plaque claims this artwork outside a children's hospital was used in the 1998 Quidditch World Cup.

A 142-foot-tall Q-tip on Bristol's skyline.

17th-century merchants in Bristol nailed their deals by placing money on these pedestals.

The unusual clock on this 18th-century market building has an extra minute hand for "Bristol time."

A quaint hamlet of nine cottages around a small green near Blaise castle.

Banksy's image of a naked man dangling from the window of a sex health clinic.

England's steepest street has such a drastic incline that locals tie their parked cars to lampposts when it gets icy.

There's a labyrinth of manmade tunnels stretching for over an acre beneath Bristol.

The abandoned funicular tunnel was a secret base for the BBC during World War II.

The Bristol Camera Obscura housed in an ancient windmill.

The experimental test tracks of a retro-futuristic monorail still stand in the French countryside.