Yes, you'll find most hotel room reservations are fully refundable as long as you cancel prior to the accommodation's cancellation deadline, which in most cases is within 24 or 48 hours of your arrival date. If you have a reservation that's non-refundable, you may still be able to cancel and get a refund within a 24-hour period of booking. Add your dates and click on "Search", then use the filter option "fully refundable" to view the best deals available near Postal Service Museum.