BOTW Directory - Recreation > Roads and Highways > Bridges and Tunnels

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Historic Bridges of Michigan and Elsewhere - Highlights the historic bridges in featured location. With a map profile and inventory of old bridges included.
Niagara Falls Bridge Commission - Description of the constructed bridge providing transportation to the Niagara falls.
North American Cable Stayed Bridge Registry - Listing of various bridge infrastructures in different cities. Includes photos as well.
Thousand Islands Bridge Authority - Introduces related information about the construction of bridges. Presents conducted studies as well.