Any suggestions for the ports of Freeport and Nassau in the bahamas while on a cruise?

My wife and I went on our honeymoon cruise last year and we did some really cool shore excursions at other port (zip-line, swimming with sting-rays, snorkeling, etc...) We're going on a another cruise this sept which stops in Freeport, Bahamas and Nassau, Bahamas. Any suggestions for fun things to do for us 24 year-olds?