The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

A maze of crosses marks the jumbled divide between the Netherlands and Belgium.

The burial place of 14 of the executed leaders of the Easter Rising.

An enigmatic monument to the Irish revolutionary who plotted an uprising against British rule.

This Neolithic passage tomb forms part of a World Heritage Site.

This cemetery overlooking the Benbulben rock formation is the final resting place of one of Ireland's most beloved poets.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

These moss-covered medieval ruins tower atop the smallest of Ireland's Aran Islands.

These gigantic skeletons tower over visitors and provide insight into the creatures that once ruled over Ireland.

This neon landmark has been posing this deadpan question to follicly-challenged Dubliners for over 50 years.

After it was swallowed by a Georgian mansion, this medieval castle remained forgotten for centuries.

The chaotic studio of one of the 20th century's most important artists has been preserved down to the dust.

An ancient chamber filled with wonderful rock art and a Neolithic carving of a human face.

This 5,300-year-old tomb with mysterious carvings crowns an Irish mountain.

The Grand Lodge of Ireland is one of the oldest in the world, full of fantastical, elaborately themed rooms.

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

The enchanting archway is the only surviving portal into Dublin’s lost medieval wall.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

An oddly conical beacon perched atop beautiful Irish cliffs.

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

A gated cross stands on the site where an Irish revolutionary met his end.

For patriotic Russians, this memorial honoring the Soviet soldiers who died liberating Berlin in 1945 is the most sacred location outside of Russia.

On the highest peak in the Harz Mountains, science and the occult faced off in a failed attempt to turn a goat into a boy.