Gospel Pass

Twmpa or Lord Hereford's Knob is a mountain in south-east Wales, forming a part of the great northwest scarp of the Black Mountains. It lies 1.86 miles (3 km) west of the border with England, and around 4.34 miles (7 km) south of Hay-on-Wye. To the northeast lies the Gospel Pass through which runs a minor road between Hay and the Llanthony Valley. A ridge known as Darren Lwyd tapers away for about 3 kilometres (1.9 mi) to the southeast of the summit.

Hay Bluff (Welsh: Penybegwn) is a prominent hill at the northern tip of the Black Mountains, an extensive upland massif which straddles the border between south-east Wales and England. The mountain sits at the point where the main northeast-facing escarpment of the Black Mountains meets the northwest facing escarpment, the next peak to the west being Twmpa. The flat summit of Hay Bluff which is marked by a triangulation pillar at a height of 677 metres (2,221 ft) overlooks the middle Wye Valley and the book town of Hay-on-Wye. The hill is largely within the Welsh county of Powys though parts of its eastern flanks lie within the English county of Herefordshire.

The Black Mountain (Welsh: Twyn Llech), is a mountain in the Black Mountains. It is the only Marilyn to fall exactly on the Welsh–English border, Powys and Herefordshire. Its parent peak, Waun Fach, lies to the west.

Black Mountain South Top is a top of Black Mountain in the Black Mountains range that spreads across parts of Powys and Monmouthshire in southeast Wales. It is a top which falls exactly on the Welsh-English border, straddling Powys and Herefordshire. The Offa's Dyke Path passes over the summit. The top is an undistinguished heathery bump on Hatterall Ridge. The summit is marked by a small pile of stones.

The Grwyne Fawr Reservoir is located in the valley of the river Grwyne Fawr in the Brecon Beacons National Park, Wales. Completed in 1928, it has the capacity to hold 400,000,000 imperial gallons (1,800 megalitres).

Hen-allt Common is a Site of Special Scientific Interest in Brecknock, Powys, Wales. Its special features include unimproved grassland, Flat-sedge Blysmus compressus and Meadow saffron Colchicum autumnale.

Llanthony Abbey is a former Anglican monastic institution founded in 1869 by Joseph Leycester Lyne (Father Ignatius), in the Welsh village of Capel-y-ffin, a few miles from the medieval Llanthony Priory. It survived until 1908, after which it was the home of artist Eric Gill. It is now holiday accommodation. It was also known as Llanthony Tertia - following on from the nearby original medieval Llanthony Priory, and its Gloucestershire offshoot Llanthony Secunda - or New Llanthony Abbey. The surviving buildings are now referred to as Capel-y-ffin Monastery.

Capel-y-ffin (Welsh for 'chapel of the boundary') is a hamlet near the English-Welsh border, a couple of miles north of Llanthony in Powys, Wales. It lies within the Black Mountains and within the Brecon Beacons National Park. The nearest town is Hay-on-Wye, some 8 miles (13 km) to the northwest.

The Hatterrall Ridge (sometimes spelled Hatterall) is a ridge in the Black Mountains forming the border between Powys and Monmouthshire in Wales and Herefordshire in England. The ridge is about 10 miles (16 km) long, and is followed by the Offa's Dyke Path. On the west side of the ridge is the Vale of Ewyas, and on the east side is the Olchon Valley and Black Hill. The western side of the ridge falls within the Brecon Beacons National Park. Much of the northern part of the ridge is a broad whaleback, but it narrows down considerably further south, and especially near to Llanthony Priory in the Vale of Ewyas to the west of the mountain. There is a large and prominent landslip on the eastern side of the mountain here, known as Black Darren, where a large slice of the rocks has fallen away from the main mass of the hill. The ridge to the southwest ends abruptly at the sheer cliff known as the Darren below which is a considerable landslide area extending south to the hamlet of Cwmyoy with its misshapen church.

Llanigon is a village and community in Powys, Wales on the edge of the Brecon Beacons National Park, north of the Black Mountains, Wales. The community population was 478. The nearest town is Hay-on-Wye, some 1.5 miles (2 km) to the east. It is in the historic county of Brecknockshire.