282K likes, 728 comments - inventionshark on May 19, 2026: "the construction of a self-supporting bridge using an ancient engineering technique. The design uses interlocking wooden logs or planks without the need for nails, screws, or pillars. It is often referred to as a "Leonardo da Vinci bridge" or an ancient Chinese arch bridge design. The structure relies on friction and gravity to maintain its integrity, allowing it to span across obstacles like canals. This method showcases traditional architectural ingenuity in creating functional crossing points with basic materials.".