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

A Biblically notable site over the ruins of an ancient city that is now a protected World Heritage site.

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

Mysterious stone tower featured in many alternative histories of the New World.

The first archaeological site discovered by aerial photography.

This legendary city has been a tourist attraction for centuries.

This small-town pizzeria won the Hollywood lottery.

A historic hotel that made a cameo in Hitchcock's classic film has no intention of letting guests forget its fame.

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

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

One of the oldest and certainly best preserved Cistercian abbeys still in existence.

This landmark church concealed a crypt packed with bones that was discovered thanks to the London Blitz.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

A crumbling stone stable and carriage house are all that remain of a manse that was once filled with Egyptian artifacts.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

This pre-Revolutionary War grist mill ground corn and flour for soldiers in seven American wars.

A tiny church on a man-made island in the Adriatic.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

Overlooking a Scottish loch, this beautifully crumbling castle once inspired a poem by William Wordsworth.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

These Roman ruins in England’s Lake District are 2,000 years old, but look pretty good for their age.