Yes, you'll find most room reservations are fully 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, you might be able to cancel it and receive a refund within a 24-hour period of booking. Add your dates and click on "Search", then filter by "fully refundable" to view the best options available near Parque Nacional Cerro Corá.