This ruined castle perched atop a rocky peak is a great place for a hike.

A larger-than-life statue of the German revolutionist stands proud in a small town where he never lived.

A mocking tribute to the past and modern leadership of Prague.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

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

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Hear the quietest sound from across the dome.

The second oldest continuously operating bar in Louisiana.

Breathtaking and huge 430 year old maps of Italy.

This former medical factory gives home to cutting edge arts in the shadow of a gas works.

Catacombs turned marketplace.

Lovers proclaim their unbreakable bond by leaving their names on locks fastened onto the Shoreditch fence in East London.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Scattered throughout London are ancient remnants of the city's former bounding wall.

Rebuilt remains of a temple to Roman god Mithras.

The taxidermied remains of a once-great parrot.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.