If you want to hike up Pen y Fan 886m, the highest peak in South Wales, most people do it the easiest way from Pont ar Daf which is the high point of the Brecon to Merthyr road. This way is easy (in good weather) but is very crowded on weekends and school holidays. Either go early in the morning, or start your walk from one of the other paths eg Cwm Gwdi to the north, or Blaen y Glyn to the east, or one of the parking places in the Taf Fechan forest to the south.
This 3 day hiking tour to the Southern Armenia is a journey, which will take us to the IV century, when Armenia became the first country in the world to adopt Christianity. It will show us the heavenly gates of the Hells Canyon Armenia and will help to imagine how people used to live in caves until recently.