Maen Llia

About

Maen Llia is a standing stone which sits on moorland at grid reference SN924192 in the Brecon Beacons National Park in Powys, Wales. The stone which is a large piece of intraformational conglomerate from the Old Red Sandstone measures 3.7 m (12 ft) high by 2.8 m (9 ft) wide by 0.9 m (3 ft). It is roughly diamond-shaped and is partly moss-covered.

It sits on a purpose made stone and earth mound. It is thought to date from the Bronze Age or later Neolithic. It is a popular tourist attraction, lying just 60 yards (55 m) off a minor road running north from the village of Ystradfellte in the Waterfall Country towards the hamlet of Heol Senni and Brecon, the county town of Brecknockshire.

There is a low heather-covered henge 240 metres (790 feet) to the southwest, a recumbent stone row 60 metres (200 feet) to the South, and a cairn 300 metres (1000 feet) to the South East, all of whom form a precise geometric pattern. This pattern contains some unique geometry not known to exist anywhere else in the world, although some aspects of it can be discerned at Stonehenge. Another significant standing stone, Maen Madoc, lies just off the old Roman road known as Sarn Helen about 2 miles (3.5 km)...