High in the clouds of San Marino sits an ancient tower with some curious prisoner graffiti.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

Abandoned railway line circling the city of Paris.

A small sculpture that pays homage to the famous bronze ear of Ca de l'Oreggia—or does it?

Third time's a charm, or in this case, two testicles are.

See what remains of a once grand ancient Roman circus.

The mark of the Devil's horns on a marble column in Milan.

This poignant art installation raises awareness of violence against women.

This curious building hides eclectic details like medieval gargoyles alongside naked angels and Art Nouveau mosaics.

Before there were doorbells this bronze ear was installed for visitors to announce their arrival.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

The secret medieval communication system will whisk your words above the noise of the crowd.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

When built, the technology here made Souter the most advanced lighthouse in the world but, nowadays, it is a tourist attraction and a (reputedly) haunted vacation spot

A lesser-known World Heritage Site with an amazing Byzantine style mosaic of Jesus on the semi-dome of the apse

This tunnel was an amazing feat of engineering and an economic success, but the coal mine which it served closed after only 18 years of the tunnel's use, but in WW2 the tunnel was converted to an air raid shelter

An angel that hatched from an egg!

An Iron Age hillfort above Britain's oldest chalk figure

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

This Roman archeological site is hidden amid a 1930s housing estate.

This may be the last of London's wooden pavements, which were once a common sight in the city.

A famous burial ground with a history both grim and literary.

This lonely bronze walrus celebrates a character in a Lewis Carroll poem.