[1] The Pembrokeshire Coast Path passes through the western ramparts of the fort on Greenala Point.

[3] The fort, occupying 1.8 hectares (4.4 acres), is defended on the east and south by sandstone cliffs, and to the north by the terracing of a steep slope; the innermost of the four resulting slopes has a height of nearly 5 metres (16 ft).

The interior of the fort, an area of 0.4 hectares (1.0 acre), is bordered on the west by a straight bank, of which the outer face is nearly 4 metres (13 ft) above a triangular annexe.

[3] The Pembrokeshire Coast Path passes through these western ramparts.

[2] There has been coastal erosion, and the fort was once larger; there are traces of defences on at least one of the adjacent stacks.