Grand Sirenis Punta Cana Resort: First trip with the SPT membership - See traveller reviews, candid photos, and great deals for. Compare room rates, hotel reviews and availability. Most hotels are fully refundable. Search Beach Resorts & Hotels in Thebes. Grand Sirenis Punta Cana Resort: First trip with the SPT membership - See traveller reviews, candid photos, and great deals for. . Search Beach Resorts & Hotels in Thebes. Compare room rates, hotel reviews and availability. Most hotels are fully refundable.