Every year, for the last 26 years, Notre Dame has hosted a bridge building contest. While the main entries are from Physics 11 and 12 students, the contest is open to other Notre Dame students, as well as people in the community who wish to participate (on a case-by-case basis). The bridge must only consist of balsa wood, and glue. Also, the bridge must weigh under 100 grams. There are many sponsors for the contest, some of them are BCIT, SFU Engeneering, UBC Engeneering Physics, and APEG.
Vancouver is a city of many interesting bridges. My Favorite is the Burrard Street Bridge.