MrTunnel.com:
Discusses many projects.
http://www.mrtunnel.com/
The Bridges Project:
Online database of significant bridges (with photos).
http://128.42.22.60/scripts/bridges/front_end/welcome.asp?opennew=2&images=1
The Tunnel Page:
The longest road and rail tunnels in the world, grouped by
categories such as sub-sea tunnels and immersed tubes.
http://home.no.net/lotsberg/
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.
http://www.bridgeink.com/
