Best palindrome

A palindrome is a sentence or phrase that reads the same backwards as forwards. For example:

Dennis and Edna sinned
Sit on a potato pan Otis
Step on no pets
He goddam mad dog, eh?
A man, a plan, a canal; Panama!

And my personal favorite (beautiful in its simplicity):

A toyota

I have a bazillion of em stored in my head...I guess I need to get a life...anybody have more?

Mitch