Make some waves and some memories with a water park adventure to Treasure Island Resort & Casino. Book our Water Park Adventure Package with promo code: LAGOON and receive a discounted room rate, passes to The Lagoon water park for up to five, a $15 food voucher and $10 in FREE slot play. You’ll also receive a voucher good for $10 in free tokens with the purchase of $10 at Cyber Quest arcade and one hour of free child care with the purchase of an hour at Kids Quest.