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How about a bridge for a river? https://en.wikipedia.org/wiki/Navigable_aqueduct https://en.wikipedia.org/wiki/Navigable_aqueduct

• lhorie 8y ago
  Also related, lift locks https://en.wikipedia.org/wiki/Peterborough_Lift_Lock https://en.wikipedia.org/wiki/Peterborough_Lift_Lock The Peterborough lift lock tour is pretty awesome, if you're ever in the area. In addition to taking the lift itself, it also goes through the Trent-Severn lock (a smaller, hand-operated lock), and the maria st bridge (a movable bridge that swings sideways to let vessels pass)
  • benj111 8y ago
    Also the Falkirk wheel https://en.m.wikipedia.org/wiki/Falkirk_Wheel https://en.m.wikipedia.org/wiki/Falkirk_Wheel
    • csours 8y ago
      Awesome: https://www.youtube.com/watch?v=qHO9gARac-w https://www.youtube.com/watch?v=qHO9gARac-w (Tom Scott)