Yes! Most hotel room reservations are fully refundable provided that you cancel prior to the hotel's cancellation deadline, which often is within 24-48 hours of your arrival date. If you booked a non-refundable reservation, you might be able to still cancel and be given a refund within 24 hours of booking. Add dates, click "Search", then you can use the "fully refundable" filter to get the best options available near Gagarin's Museum.