What looks like a normal building is really a hollow facade hiding a subway vent.

The oldest stone house in Paris was built by its most famous alchemist.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

The fake World Cup prize was secretly created after the first one was stolen in 1966.

The world's first purpose-built motor racetrack was destroyed by the outbreak of two world wars.

Be on the lookout for the symbolic insect all over the city.

The red letters in the literary pavement leading to the library form a mysterious code.

The Tudor-style cottage in the middle of the square is not quite what it seems.

A complicated contraption for telling time by the moon.

A treasure trove of astronomical, mathematical, and scientific instruments at Cambridge University.

Museum celebrating the history of computers, especially their role in codebreaking.

The oldest working mechanical clock in the world.

The view from this giant Stone Age toad is unexpectedly beautiful.

The first tunnel to be dug beneath a river, repurposed as an art and museum space.

Home to the most complete dodo remains known - one head, and one foot.

One of Europe's oldest libraries.

The Columbia Road Flower Market is now open every Sunday, rain or shine.

Pop culture has helped to keep this iconic British building from being destroyed.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

An small and easily overlooked archaeology museum chock full of Egyptian artifacts.

A collection of comics, graphic novels, animation and caricatures devoted to exploring this often overlooked art form.

Abstract dinosaur models in London.

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