A small but immensely extravagant palace built by the "Night King."

The prototype for all Nazi concentration camps.

The somewhat misnamed 'Garden of Shells' lovingly built from found objects.

Flamboyant architecture from the turn of 20th century.

A black cat protests the City Guild in Riga's Old Town.

3,000 market stands in five former Zeppelin hangars.

Europe’s oldest natural human mummy.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

The largest island on the great salt lake is home to curious creatures and strange stories.

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.

The self-made house sculpture of an outsider artist who named himself "Chief Rolling Thunder."

A tribute to the twin ideals of religion and patriotism, built by a Catholic priest from rocks, glass, and innumerable found items.

A site of pagan worship which still attracts people looking for fairies.

A museum dedicated to exhibiting remarkable outsider art.

A countryside Romanian cemetery filled with colorful crosses bearing lyrical, ironic, or satirical rhymes.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

A marvel of Byzantine engineering under the streets of Istanbul.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

A church of bones, decorated with 40,000 human skeletons.

Macabre astrological automaton clock dating to the late 1400s.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”