As we all know, Leonardo Da Vinci was the famous painter of Mona Lisa painting. He was scientist, philosopher, painter, sculptor, architect, inventor all rolled into one. Here is one of his designs to construct a bridge which doesn’t need any carpentry, glue or nails. This design is still being used in many places in world. Watch this wonderful video to see how you can build this bridge and marvel at its simple design, yet so magnificent. My salute to the great Leonardo Da Vinci !