The grounds of the institution have a wealth of activities, all of which cost extra beyond the gate fee. Activities include a state-of-the-art fitness center ($7 a day), a swimming pool ($2 per swim session), weeklong sailing instruction (call for rates), bike rental ($45 per week), tennis ($12-$16 per hour), and golf (greens fees $36 weekdays, $46 weekends), or you could always go swimming in the lake for free.