A 16th-century horror show built in a lovely Italian garden.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

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

It might look like just a pile of sticks—because it is. But there's a dark history to how this stack got its start.

Danish whalers once brought back whale bones to use as building materials in places where wood was scarce.

This remote island, home to the easternmost point in Denmark, once hosted pirates and a military fortress.

An artist has turned what most people would consider a bathroom nightmare into a work of political art.

An abandoned bear enclosure from a 19th-century zoo located in a Danish forest.

Long before ultrasounds and modern testing, medical specimens like these conjoined twins helped physicians learn about congenital anomalies.

A spiralling hourglass-shaped tower rises from the forests in Denmark.

This Danish art forest places loud works of contemporary art among the pensive silence of nature.

The largest collection of hair jewelry in Europe reminds you how creepy 19th-century love was.

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

These old World War II fortifications have been transformed into an unusual equine attraction.

An old Danish political institution where members of government can grab a drink off the record.

The art museum is decorated with creatively remodeled pre-Nazi swastikas.

The world's first combination ski slope and power plant.

Remnants of the Nazis' occupation of Denmark linger along the sand.

A failed attempt to control drifting sands yielded a gnarled sylvan wonderland.

An old limestone mine transformed into a beautiful and unusual sculpture museum.

This striking royal residence is the largest Renaissance-style castle in Scandinavia.

This Danish castle is supposedly haunted by a woman too independent to not be a witch.

The decaying remains of a 1960s mechanical wonderland that never officially closed.