Oklahoma City, Oklahoma USA - legacies of Native Americans, cowboys and cattle. Things to do include National Cowboy and Western Heritage Museum, the Oklahoma Museum of Art and the Oklahoma City National Memorial and museum.
Philbrook Mansion, Tulsa, Oklahoma, my favorite art museum while growing up in Tulsa. The building was the Tulsa mansion of the Phillips family of oil fame. They preferred their mansion in Bartlesville -- is I remember correctly!