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

A cluttered and astounding collection of antiquities and curiosities.

This hidden green space is the city's second largest conservatory.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

London's smallest police station is barely the size of a phone booth.

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

This castle was established by the 4th Duke of Montrose and is connected to the Buchanan Clan.

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

This wildly-tiled artist's palace is a living and growing account of the creator's life, loves, and labors.

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.

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

This tangled English forest looks like something right out of a fairytale.

Hear the quietest sound from across the dome.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

The longest hedge maze in the world.

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

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

The anatomical-pathological collection of a man who changed surgery.

Northern Ireland's Brobdingnagian stepping stones.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

Spend the night in this formerly abandoned traditional Scottish village.