Never been to St Louis but if I ever were to find myself there i'd have to check out the Arch (that IS where the arch is , isn't it?

).
As for the car, I've experienced no finer road trip automobile than my 300C; whether cruising on the interstate or exploring curvy mountain backroads (ok you don't have mountains

) this car is superb. I drove for 14 hours straight one day over 3 mountain ranges and all types of roads, and was still comfortable and relaxed when I finally stopped for the night. I averaged 22.6 mpg over the entire 2600 mile trip and I did NOT drive like grandma either!