Waldo-Hancock Bridge
- Provides brief description and picture of the first long-span suspension bridge in the state.
- http://www.maine.gov/mdot/covered-bridges/waldo.php

Bailey Island Bridge
- History and old photographs of the structure erected in 1926 connecting Orr's Island to Bailey. A historic civil engineering landmark.
- http://www.maine.gov/mdot/covered-bridges/baileyis.php

MaineDOT: Covered Bridges
- Location, pictures, and history of covered wooden bridges in the state.
- http://www.maine.gov/mdot/covered-bridges/wooden.php