Museum devoted to the artificial language of Esperanto.

A failed utopia, shut down by a more legitimate nation.

"We Seceded Where Others Failed."

A micronation of epic proportions.

A 550-square-meter micro-nation off the coast of Britain.

Micro-nation based around a nine-story high illegally built tower.

A spherical "micro-nation" in the heart of Vienna.

Even after the church tried to wipe the practice out, this pagan festival lives on each year in a small Scottish village.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

A 30-acre garden inspired by the principles of modern physics.

A nuclear bunker built to shelter the politicians and important people of Scotland in case of nuclear attack.

Built to hold the worst of the worst of the Nazi war prisoners.

The world's oldest surviving music hall was also once a freakshow.

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

Protecting the dead from opportunistic body snatchers.

The final resting place of soldiers' loyal canine companions.

A giant pineapple, a symbol of hospitality, and an amazing vacation rental option.

Ruined castle with subterranean vaulted Goblin Ha' or "Goblin Hall."

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

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

A peace symbol in Northern Ireland is among the world's largest hedge mazes.

Northern Ireland's church-turned-skate park.

Northern Ireland's Brobdingnagian stepping stones.

The lake that fills and empties itself at random.