Located on the North side of Brackla Ridge, locally known as the "8 x s, the 7 massive underground magazine storage tunnels complete with platform were cut deep into Brackla Hill. Guarded by pill boxes overlooking the hill, they would protect the high explosives held within.

Today, numbers 1 and 2 have been filled in, only their vent shafts remaining, 3 and 4 being maintained to this day and were chosen as the headquarters for the Welsh RGHQ in time of nuclear war,  numbers 5, 6 and 7 are filled in but a lot of evidence still remaining.

Later on during the war, an eighth tunnel was constructed at the Waterton site but the complex was not connected underground.

Each tunnel led into a huge chamber sub divided into 8 smaller magazines separated by a 10 ft wall. The chambers run into Brackla hill nearly 150ft, whilst each chamber is approx 120ft wide.

Whilst some of the landscaped tunnels are still accesible i would not recommend it, these are very unstable and bad air has been recorded underground.

The remaining two converted bunkers are privately owned locally, used for secure storage.

Below images from the famous 1981 visit by local officials