Save up to 46% November Treats Grand Sirenis Riviera Maya Hotel & Spa, Mexico. Save upto 46% , book on Sirenis website your stay at Grand Sirenis Riviera Maya Hotel & Spa during the month of November 2015. This fantastic price includes an extra discount for booking a non refundable rate. T&C: Booking Period: Now until September 4, 2015. Staying Period: November 1, 2015 to November 30, 2015. Book Now.