Historic Bridges of Michigan and Elsewhere
- Nathan Holth offers information, photographs, and maps for historic bridges, particularly metal truss bridges in the United States and Canada, notably Michigan and Ontario.
- http://www.historicbridges.org/

The Peace Bridge
- History and current data on this link between the United States and Canada. Also includes information on the prehistoric aboriginal discoveries adjacent to the bridge.
- http://www.peacebridge.com/