There’s a crypt in Rome that is mainly constructed from the skeletal remains of 4000 monks.
Switzerland is the only country in the world that requires all of its citizens to have 24/7 access to a bunker.
There is a semi-secret city under Las Vegas, inhabited by hundreds of people.
By 400 BC, Persian engineers had mastered the technique of storing ice in the middle of summer in the desert.
Robert Hansen, an Alaskan serial killer flew his victims up into the mountains and later hunted them down.
The first webcam was created to watch a pot of coffee.