The writing studio of an American adventure author, built in the style of a medieval castle.

A hidden three-foot-wide house separates these two regal churches.

A cross marks the spot in a small Scottish village that claims to be the exact center of the country.

This old Victorian bathhouse is fed by an ancient spring.

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

More than 200 eclectic sculptures surround the artist's home.

These 5,000-year-old cave paintings provide a glimpse into prehistoric Finnish life.

If you visit Santa's village, you can get your passport stamped to show you crossed into the Arctic Circle.

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

Roughly 17 million letters to Santa have found their way to this Arctic Circle post office.

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

A replica of the home of a famous fictional troll family.

Crawling into this primordial cave may feel disconcertingly familiar.

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

This fantastical icy castle is built anew every winter.

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

The celebrated eyesore created by starry-eyed sweethearts.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

According to a local legend, this peculiar mountaintop rock formation is actually a demon that was turned into stone.

Erosion left these fascinating granite formations strewn across fields and mountains in Burgundy.

The home where the famous astrologer wrote some of his most telling prophecies.

The second-largest natural arch in the Chartreuse Mountains.

A charming little museum founded by the designer of the Statue of Liberty.

A garden of massive sculptures sits in Jean Lindard's backyard.