The Barbegal Aqueduct included a watermill complex with water cascading through a total of sixteen wheels. It may have been "the greatest known concentration of mechanical power in the ancient world" Article 823 words 13 votes
The treadmill/treadwheel crane sounds like something from Astérix or the Flintstones. But at Guédelon in France, not only do they have one, they're using it to help build their brand new castle. Video 6:23 7 votes