An incredibly well-preserved piece of ninth-century Viking poop.

At 22 feet tall, these Bronze Age monoliths are some of the tallest standing stones in the United Kingdom.

Once thought to be the mysterious work of a witchy prophetess, a well with unusual properties turns objects into "stone".

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

A bizarre house filled with an astounding array of collections.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

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

A forest of immensely tall and unusually straight oak trees planted nearly 200 years ago to build naval ships that never came to be.

A regular looking rock with an unbelievable history.

A burial vault located under Tiber Island in the middle of the Italian capital.

The mystic whose incorrupt corpse still attracts the faithful.

The encased skull that is widely believed to belong to St. John the Baptist.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

The relics of dozens of martyrs are stored in a single chapel.

The severed head of a 17th-century Irish martyr lies within an intricate golden shrine.

The remains of the left arm of the levitating philosopher-saint are kept in a 13th-century Neapolitan basilica.

The only pig museum in the U.S. holds one of the world's largest collections of pig items.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

This enchanting mountain plateau celebrates spooky local folklore.

This castle played host to the largest great hall found in medieval Central Europe.

Hidden within this iconic mountain are a set of World War II bunkers once used by German forces.

Generations have refused to move this doll from its dusty resting place to preserve a castle from a watery fate.

This stone was once used by druids to determine a person's innocence or guilt.

Considered one of the most haunted places in Europe, this 800-year-old castle was home to noble prisoners.