On a working sheep farm just south of the Cantref Reservoir, this excellent custom conversion of an old stone barn offers smart six- and 10-bed bunk rooms and two small private rooms. There's an excellent kitchen, a common area, outdoor tables, a boot room and a laundry. At weekends it's usually booked up by groups, but solo travellers shouldn't have trouble midweek.
Coed Owen Bunkhouse
Top choice in Parc Cenedlaethol Bannau Brycheiniog