If you are looking for a way to smarten up your travels, you may want to look into the Sightseer’s Guide to Engineering provided by the National Society of Professional Engineers and National Engineers Week.
From the entry on the Tacoma Narrows Bridge:
To engineers, crossing the Tacoma Narrows presented more of an economic challenge. Originally it was hoped the federal government would help pay for an $11 million bridge that would cut at least 40 miles off the trip between Tacoma and Bremerton. After the federal government refused, the state turned to Leon Moisseiff, who calculated that a thin-plate girder type bridge could be built for only $6.4 million. The collapse of the bridge shocked the engineering community, and the lessons learned did a lot to shape future American bridge building. The replacement bridge, built in 1950, is one of the largest suspension bridges in the world.
There are entries for each of the states, though it appears that they could use some suggestions for additional places for engineering minded vacation spots. Via Celeste.