Dublin's "Dead Zoo" serves as a window to Victorian museum design.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

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

A museum that cashes in on its infamous little people while teaching you a thing or two about the Irish fey.

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

This bed and breakfast is steeped in history and offers guests a unique way to experience nature—glass igloos on a frozen lake.

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

One of the world's most unusual events combines headbanging and needlework.

The last permanent exhibit dedicated to the Soviet leader.

Fortifications built for a Soviet invasion that never came now sit abandoned in a losing battle against nature.

A little-known sculpture park of contemporary environmental art in a Lapland forest.

Hidden deep in a forest is this geological wonder carved by glaciers.

The tiny, studious rodents greet visitors to the National Archives of Finland.

This lake-bound geographical marker sits at the point where three European countries intersect.

Collection of nearly 500 concrete figures sculpted by the late Veijo Rönkkönen.

An abstract monument to a symphonic composer.

Legend has this precariously placed rock was placed by giants. Science has another explanation.

In Costa Rica's cloud forest, the roots of a woody ficus create a botanical bridge.

Sloth rehabilitation center in the jungle of Costa Rica.

Once a prosperous mining village, this tiny Taiwanese town is now overrun with cute cats.

A rare surviving Victorian greenhouse designed specifically to house giant water lilies.