One family's environment-friendly hobbit-house in Wales.

Remnants of a Victorian garden feature sitting in public woodland.

Ottoman-era houses lovingly preserved.

Hundreds of hidden passageways weave through the old quarters of Lyon.

An architectural marvel that spans the Arda River, and has stories of a haunted past.

The stately remains of Llywelyn the Great's mighty fortress.

This hospital once pioneered the use of electroencephalograms, but fell into maltreatment, abuse, and eventual abandonment.

An abandoned castle owned and ignored by Masons carries a cursed history.

A unique underground structure dating back to the 1st century BC.

Abandoned limestone cave was once a sacred place of worship.

Famously misunderstood wonder of the ancient world

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

A Romanesque tower appears when water levels drop.

Historic medieval fortified city in southwest France.

Fossils, railroads, and waterfalls!

Nightmarish example of the unintended consequences of weapons testing.

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

The ruins of an ancient island city built atop a coral reef in the South Pacific are spectacular and strange enough to have inspired H.P. Lovecraft.