Yes, you'll find most hotel bookings are refundable provided that you cancel before the hotel's cancellation deadline, which is often 24 or 48 hours before your scheduled arrival. If you have a reservation that's non-refundable, you might be able to still cancel and be given a refund within a 24-hour period of your booking. Add your dates and click on "Search", then use the "fully refundable" filter to get the best options available near Haideng Martial Art House.
