Before driving into Missouri, detour off I-270 at exit 3. Follow Hwy 3 (aka Lewis and Clark Blvd) south, turn right at the first stoplight and drive west to the 1929 Chain of Rocks Bridge. Open only to pedestrians and cyclists these days, the mile-long span over the Mississippi River has a 22-degree angled bend (the cause of many a crash, hence the ban on cars). Hide your valuables and lock your car if you leave it to go exploring.
