A quiet and contemplative oasis in the middle of New York's bustle and riot.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

This Fifth Avenue church has long been the favored worshiping place of Broadway actors and vaudeville performers.

Take in a rare, face-to-face glimpse of Lady Liberty at this tucked away Red Hook park.

Sniff the Titan Arum's rotting flesh.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

A very classy 1920s-era bar right in Grand Central Station.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

It is said the legendary wizard once lived in this sea cave beneath Tintagel Castle.

A fantastic castle rumored to be the birthplace of King Arthur.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

Hear the quietest sound from across the dome.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

The longest hedge maze in the world.

Rebuilt remains of a temple to Roman god Mithras.

An unusual round church in London with a Templar past.

A tongue-in-cheek arcade where the games are based on everyday life.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

Famously misunderstood wonder of the ancient world

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.