| A Span For All Seasons | | A collection of photographs of facilities and a large worldwide inventory of suspension bridges. |
| Bridge of the Month Quiz | | An image is posted inviting entrants to identify the feature. A free copy of a book on the subject is awarded to one correct entrant per month. |
| Bridgepix.com | | Contains photographs and scans of other media of subjects worldwide. |
| International Peace Highway Project | | International Highway Construction Corporation, supporters of a highway system connecting most of the world which would include a Bering Strait bridge and Japan-South Korea tunnel. |
| The Bridges Project | | Online database of significant bridges compiled by the Department of Civil Engineering at Rice University. Includes photographs. |
| The Tunnel Page | | The longest road and rail tunnels in the world, grouped by categories such as sub-sea tunnels and immersed tubes. |
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