The oldest Dutch colonial stone house in New York City is a hidden gem on the border of Brooklyn and Queens.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

The grounds of this Jacobean estate contain one of the oldest mulberry trees in England.

An eccentric 18th century naval officer built a ship's quarterdeck on his roof, the inspiration for Mary Poppins's "Admiral Boom."

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

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

The remains of the great moral philosopher reside in a university in London.

Colorful murals by Jean Cocteau hide within this peaceful London sanctuary.

Installed at a chaotic intersection, this gave London traffic cops a place to hang their heavy woolen coats.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

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

Remnants of cells from the most notorious London prison may lie in the basement of a rare Victorian Gin Palace.

Hear the quietest sound from across the dome.

A quiet memorial to those who died saving others in the heart of the City of London.

A mysterious carving from 17th-century London seemingly depicts a young boy sitting on a bread basket.

This crumbling headstone commemorates the first death by tiger in Britain's history.

Colin Stokes "got a bit carried away" and built a castle that looks like something out of Tolkien.

The home of an eccentric Edwardian gentleman is packed to the rafters with handcrafted items collected over a lifetime.

A rotting air force base is now home to rare birds and scarce plants.

This strategically placed hill fort has served defensive forces from the Iron Age up until the 20th century.

The beloved fantasy novelist is buried near a church containing a whimsical etched glass window full of Narnia favorites.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.