These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

This stunning sea creature-shaped home blends into the landscape like a fantasy villa.

The ruins of the castle that chemicals built.

Acres of natural wonders left behind by a socialite-turned-gardener.

This glamorous old building is said to have inspired the Tower of Terror.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

A hospital closed seemingly in the middle of operations, leaving behind fodder for horror films and ghost hunters.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

This picturesque view of the Scottish Borders was beloved by Sir Walter Scott.

One of Scotland's most important modern structures, it just made the '100 Most Endangered Sites' list.

A remarkably well preserved tower dating all the way back to the Iron Age.

At high tide this strange footbridge appears to have no purpose whatsoever.

The last inhabitants of one of the U.K.'s most remote islands were evacuated in 1930.

Largest lake in Great Britain measured by surface area.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

This stately estate house features a tower covered in a bright, modern mural.

This Scottish bridge seems to compel dogs to leap to their death.

Spend the night in this formerly abandoned traditional Scottish village.

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

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

The fountain marks the area where hundreds of accused witches were burned at the stake.

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

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

A church that bred legends, and served as an inspiration for the Da Vinci Code.