Yes, the majority of hotel room reservations are fully refundable as long as you cancel prior to the accommodation's cancellation deadline, which is often 24 or 48 hours before your check-in date. If you booked a non-refundable reservation, you might be able to still cancel and get a refund within a 24-hour period of your booking. Enter dates in and click on "Search", then use the filter option "fully refundable" to view the best deals near Fort No. 5 King Frederick Wilhelm III.