On Wednesday, we took a walk across the Old Chain of Rocks Bridge that connects Madison, IL with St. Louis, MO over the Mississippi River.

The bridge was built in 1929 and was part of old Route 66. It was open to vehicular traffic for about 40 years, and in 1999 became a pedestrian bridge. At about a mile long, it looks like it goes on forever! I guess you don’t usually think about how long bridges are when you’re zipping across them in a car!

But if you look closely, you’ll notice the most remarkable feature of the bridge…a 30-degree turn that was added to the design to make the waters below easier for boats to navigate.

It’s a truly impressive bend…I can’t really imagine actually driving across it!

One of the reasons the waters of the Mississippi are tough to navigate at this point, besides the eponymous “chain of rocks” under the water, are the two “castles” (originally water intake towers) adjacent to the bridge.

There are a few references to Route 66 along the way:

It is an outstanding example of engineering!

There are gates at each end of the bridge that are presumably closed from sunset to sunrise:

We walked from one state to another…and back!

This was our first Route 66-themed field trip for this year’s summer school…I have a few more planned that I’m also really excited about!