Northern Ireland's Brobdingnagian stepping stones.

The most loyal of little dogs, or a Victorian era publicity stunt?

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

A natural wonder in south Denmark.

A public display of random paleontology.

This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.

Six beautiful wooden giants are hidden around Copenhagen.

A modern Nordic Pompeii on the Icelandic island of Heimaey.

Every summer local children form "pysja patrols" to save young birds that have wandered from their nests.

On an island south of Iceland, a large volcanic rock formation resembles an elephant.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

Island where motor vehicles are banned -- home to the only carless highway in the United States.

Talula the swan has been welcoming visitors to Elk Rapids, Michigan, for more than four decades.

A monument celebrating the idea of reaching inaccessible places.

Elevated freight railway turned wildly successful urban park.

The world's largest occupied bat houses hold hundreds of thousands of flying mammals.

A small "palace" and museum made of, and devoted entirely, to salt.

Deep into the lower floors of Pike Place, find a date with fowl fate.

A wall of chewing gum moonlights as collective art.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

Iconic rock formations that allow for exploration during high or low tide.