Yes, you'll find most room reservations are refundable if you cancel prior to the hotel's cancellation deadline, which is usually within 24-48 hours of your arrival date. If your reservation is non-refundable, it may still be possible to cancel it and receive a refund within 24 hours of booking. Add your dates and click on "Search", then use the filter option "fully refundable" to get the best deals available near Parque San Martín.