Yes, you'll find most hotel reservations are fully refundable if you cancel before the hotel's cancellation deadline, which in most cases is within 24 or 48 hours of check in. If you booked a non-refundable reservation, it may still be possible 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 get the best options available near Burdenko House Museum.