Having finished the river modules, I had to make a bridge. To be fair, there are several papercraft bridges that can be bought on the Internet, printed and built, but I was interested in crafting one from scratch.
I used a sheet of light gray paper, drawing the stones with a darker gray color pencil. The bridge was made of three pieces (sides and floor), all of them glued to 2mm cardboard. To finish, I glued some modeling grass to simulate moss.