I like this one simply because there is a wax recording of him reading it. See it below the poem.

~~

America

Centre of equal daughters, equal sons,
All, all alike endear’d, grown, ungrown, young or old,
Strong, ample, fair, enduring, capable, rich,
Perennial with the Earth, with Freedom, Law and Love,
A grand, sane, towering, seated Mother,
Chair’d in the adamant of Time.
~~ Walt Whitman