After a motorcycle crash left him with an 80% leg disability, Austrian chef Peter Lammer created a ceiling rail system that lets him move around the kitchen and continue working.
More people need to know that ancient Roman engineering was so precise, their aqueducts still produce clear water to this very day - 2,000 years later.
The secret to survival behind Nuremberg Castle's walls
A 50-meter-deep well carved into solid rock. In medieval sieges, secure water mattered more than thick walls.