Mysterious 500-year-old tapestries depict a unicorn hunt.

The remains of the furnace and iron works that produced the massive Hudson River Chain still stand in the woods of New York.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

This artistic fountain display pays homage to this area's theatrical history.

The bears of Bern have been a city highlight for over 500 years.

Artworks by loners, prisoners and the criminally insane.

A cablecar-station-turned-revolving restaurant with 360-degree views of the Swiss skyline.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

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

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

The maze-like transportation hub contains abandoned areas, derelict stores, and a resident bat colony.

The only quarter of the Old City not dedicated to a major world religion.

This nightmarish children's plaything was left grotesque to help kids conquer their fear.

The tallest waterfall in the Judean Desert is named for its connection to a biblical figure.

A "miracle" that seems to produce more holy fistfights than holy revelations.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

Built by a king and rebuilt by an emperor, this aqueduct transported water for 1,200 years to this ancient Mediterranean hub.

An ancient underground cultic temple where sunlight penetrates on the summer solstice.

A terrific purveyor of natural history objects and curios.