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Triangulation Pillar OSBM S1782: Pen Allt Mawr   

Grid reference: SO 20689 24329.
Landranger 161: Abergavenny & The Black Mountains.
Explorer OL13: Brecon Beacons National Park East.
Waypoint: TP5347.

Neighbouring Triangulation Pillars
S2178 Pen Cerig Calch 2.21km to the southeast.
S2513 Mynydd Llangorse 5.28km to the west.
2986 Gwynydd Bach 5.71km to the north.
S7275 Crug Mawr 5.78km to the east.
S1781 Mynydd Troed 6.41km to the northwest.
The nearest fundamental bench mark is Abergavenny, 15.40km to the southeast.