A remarkably intact castle that once was the largest in Ireland.

Modern sundial uses ancient methods to tell time and date perfectly.

A strange egg in a mucky bog of western Ireland marks the spot of an aviation milestone.

No one knows who's responsible for decorating this tunnel with stuffed animals, but the people love it enough to protest their removal.

A subterranean house of worship carved right out of the bedrock.

This honeycomb-textured tafone looks like a petrified troll head.

Estonia's largest creative city is a vibrant bohemian hub located within a former industrial complex.

A trio of giant wooden megaphones turn up nature's volume in this Estonian forest.

"There's nothing there," and other lies the KGB told us.

An underground nightclub helped spark a "Singing Revolution."

Sausages, schnitzel, and weiners.