The sukkah symbolizes the temporary shelters in which our ancestors lived during the forty-four years they wandered the dessert led by Moses. Sukkot are commanded to be temporary structures but there is no rule that they be shoddy or tacky. Susan Shender, a St. Louis architect, has designed a sukkah that is beautiful, simple, and architectually meaningful: the triangular columns are symbolic of the Sefirot: the ten sides of Godliness according to Kabbalah. The sukkah comes in a kit sent directly from Susan at her website Sukkah Soul.
Check out ModernTribe's sukkah decorations to dress it up.