How is the stone masonry bridge built and made?

Stone masonry bridges are constructed using carefully selected stones that are quarried and shaped to fit together tightly without the use of mortar. The process begins with a solid foundation, followed by the arch or span being built, where stones are laid in a precise arrangement to distribute weight efficiently. The keystone, typically the central stone at the apex of the arch, locks the other stones in place. Finally, decorative elements and protective coatings may be added to enhance durability and aesthetics.