Have visited the Cairo on previous trips. This time we went across the river to see the remains of "Grant's Canal". Not too much preserved, but you can see the unprotected portion running through cultivated land to a levee.
Interstate highway cuts right across ithe canal bed just outside the tiny park boundaries. it's not like the couldn't have run the bridgeworks just a bit further!
Just missed it! The canal remains on the far side of the Interstate highway are in this field, just behind the tree...Probably should have stopped, but a big vehicle was following on the two lane road.