Online database of significant bridges compiled by the Department of Civil Engineering at Rice University. Includes photographs. http://bridges.civil.rice.edu/
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/
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. http://www.iijnet.or.jp/IHCC/index.html