What was once thought to be a wellspring of unicorn bones is actually just a prehistoric burial site.

This "floating railway" is one of the world's oldest monorail systems.

This collection of solar timekeepers includes the world's first digital sundial.

The foundations of a forgotten fortress, wedged in between two streams.

A taxus-tree to which Julius Caesar reputedly tied his horse.

Go inside to really appreciate this 500-year-old technological masterpiece.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.