Bwlch-gwynt (SN 079321): Tis was the site of a searchlight battery, high on the moorland slopes, of which little or no trace now remains.
Garnwen, Brynberian (SN 114349): Te moorland here formed part of the wartime tank range which extended across much of the Preselis. Tank tracks have been noted on the slopes of Waun Brwynant as far south as Hafod-Tydfil.
Brynberian Bridge (SN 104350):
was a small complex of workshops and garages built in connection with the above tank range.
Tank track turning circles Waun Brwynant, nr. Llanberian. Even though 68 years have passed these features can still be seen on the ground.