This irregularly shaped sea fortress has defended not one but three different sovereign states.

This insurance company building reminds customers that witches, bears, and gnomes are out there, best be insured.

Crawling into this primordial cave may feel disconcertingly familiar.

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

A lovingly curated curio shop in which the taxidermy wear newspaper party hats, and peanut shells are spread across every surface.

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

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

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

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

Villas that once served as playgrounds for the rich now fall away in decay.

The curios of pharmacist and collector Henry Wellcome.

This 1920s Dutch barge is now a floating bookstore.

London's largest outsider art museum.

Catacombs turned marketplace.

A kaleidoscopic warehouse-maze of handmade neon signs.