This bar hosts an ever-evolving napkin art installation devoted to an American president.

Every winter, this tiny islet on Florida’s Gulf Coast is swarmed by some of the largest birds on the continent.

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

This ruined travelers shelter sits abandoned in a desolate bog of Flow Country.

A mysterious ruin shrouded in more folklore than fact.

The most northern place on the mainland of Great Britain.

This rare surviving broch is one of Scotland's most impressive Bronze Age structures.

This site contains overlapping ancient graveyards that existed about 1,000 years apart.

In the Scottish Highlands, this 13th-century castle ruin is hidden at the end of a farm track.

These ruins are a hidden gem, complete with fantastic views over the cliff edge.

The overgrown ruins of this once majestic castle sit forlornly in the Scottish countryside.

The ruins of a 15th-century tower house.

The sole surviving large cairn in an area that was once littered with burial monuments.

Considered "the most original, complete, and unimproved" circles in Aberdeenshire.

The remains of a grand castle that may have inspired Bram Stoker's Dracula.

Glasgow's memorial to the International Brigade volunteers from Great Britain who fought and died in the Spanish Civil War.

The remains of an anti-aircraft battery from World War II look out over Glasgow.

The elaborate clockwork contraptions in this Scottish gallery create small worlds of whimsy and horror.

This Danish rock field is actually a sprawling ancient cemetery holding the bodies of 700 Vikings.

This secret collection of the strange and occult was rediscovered in a forgotten room of an old house.

Remnants of the Nazis' occupation of Denmark linger along the sand.

Generations have refused to move this doll from its dusty resting place to preserve a castle from a watery fate.

The humble horn finally finds a place in the sun.

A mysterious crater-like pond has a spooky tendency to empty and fill with complete disregard to rainfall patterns.