These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

These fantastically named natural pools look like something out of a Scottish myth.

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

The one-time stronghold of the noble Douglas family, now home to ghost sightings and nesting birds.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

A 18th century graveyard and its astonishing cortege of macabre iconography.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

These 18th century gardens tell a rocky story of the son of Odysseus.

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

North America's oldest quarantine facility was built in response to Philadelphia's 1793 yellow fever outbreak.

A museum within a museum, devoted to history's most questionable medical devices.