Possibly more interest per square foot than any other part of the Geopark. The mix of rocks - Old Red Sandstone, Carboniferous Limestone, Twrch Sandstone and Coal Measures - give rise to a richly detailed landscape. This is the place too to start your exploration of the wilder parts of the Geopark.

• Craig-y-nos Country Park - occupying the 'narrows' between the limestone cliffs of Craig-y-nos and Craig Rhiwarth.
• Cribarth -  often described as a 'mini-mountain' - definitely one of the most interesting hills in Britain.
• Henrhyd Falls - highest falls in South Wales.
• Penwyllt & Ogof Ffynnon Ddu NNR - geology, botany and industrial archaeology coming together in one fascinating area.
• Waun Fignen-felen - a bog with a past and, after recent human intervention, a future.
• Brecon Forest Tramroad - early C19th transport network whose remains can still be seen in the landscape.
• Fan Hir & Llyn y Fan Fawr - a glacial lake nestling beneath an impressive mountain scarp