This piece of Australian modern art is part joke and part history.

A local landmark that has become a hub of graffiti and urban exploration.

Once housing children next to hardened criminals this historic jail once displayed Ned Kelly's skull until it was stolen.

Started nearly 100 years ago, this science experiment just keeps on going, ever so slowly.

Nine limestone rock stacks on Australia's "Shipwreck Coast."

A clear example of the process of erosion in action.

A collection of outdoor mystical statues paying homage to indigenous Australians and ecological stewardship.

The bears of Bern have been a city highlight for over 500 years.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

It holds a fabulously designed tribute to astronomer Edmond Halley.

A quartet of tiled art pieces adorn the floors of this prestigious art museum.

At almost 1,000 years old, this is the oldest known door in all of Britain.

Only a few pieces remain of the structure that carried people and goods across the Thames for some 600 years.

This medieval church tower has maintained its clockworks since the 16th century.

The "beautiful" equation predicting the movement of all electromagnetic particles is engraved in front of Newton's tomb.

The commemorative stone column conceals a secret laboratory.

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

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

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

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

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

Eighty million natural history specimens call this gargantuan museum home.