Yes, most hotel reservations are fully refundable provided that you cancel before the hotel's cancellation deadline, which in most cases is within 24 or 48 hours of your check-in date. If you have a reservation that's non-refundable, it might still be possible to cancel it and be given a refund within 24 hours of your booking. Plug in your dates, click on "Search", then you can filter by "fully refundable" to get the best deals near Santa Cruz la Vieja Historical Park.