The oldest working mechanical clock in the world.

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

An unusual round church in London with a Templar past.

Hear the quietest sound from across the dome.

This one has sailed five times as far as Sir Francis Drake's famous ship.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Berlin's old airport.

Metro station with a claim to rock n' roll fame.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

The most visited, and possibly most controversial, museum in Germany.

A little sculpture with a large wardrobe.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

The curious underground history of keeping Paris clean.

This bridge was constructed from the rubble of the infamous Bastille.

This modest marker near Notre Dame identifies the very center of Paris.

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

The mummified heart of Louis XVII, the lost dauphin of the French Revolution.

The bomb-ravaged remains of of a colossal Neptune.

A lover's walk between hilltop towns, decorated with graffiti love notes.

Da Vinci's equestrian statue, 500 years in the making.

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

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

Go inside to really appreciate this 500-year-old technological masterpiece.

Ancient snack bar of the Roman Empire re-opened.