The scenery of the Brecon Beacons National Park is both beautiful and diverse - from rolling countryside with long valleys and hidden villages to the wild beauty of the high mountains, waterfalls and caves. There are four mountain ranges within the park: the Black Mountain (to the west), Fforest Fawr, the Brecon Beacons and the Black Mountains (to the east). Much of the area consists of high, open country with smooth grassy slopes lying on red sandstone. On the northern edge there are steep escarpments whilst on the southern rim there are limestone crags, wooded gorges, waterfalls and caves. Each of the four mountain ranges has its own distinct character and this guide explores them all.