re: Is Memphis worth visiting?

Sure

If you are out after dark and you see a street sign saying "Crump" or "Lamar" lock your doors and drive far away as inconspicuously as possible.

I think there is an observation deck on the top of the pyramid that has a great view of the river and the mapof the Mississippi on Mud Island is interesting if you have ever had anything to do with the river.

There's a weekend's worth of things to see.