Yes, you'll find most hotel reservations are refundable if you cancel prior to the hotel's cancellation deadline, which is often 24 or 48 hours before your scheduled arrival. If your reservation is non-refundable, it might still be possible to cancel it and receive a refund within 24 hours of your booking. Add your dates and click on "Search", then filter by "fully refundable" to get the best options available near Carlos Botelho State Park.