The Brecon Beacons is the chosen testing ground for one of the most revered fighting forces in the world – the Special Air Service.

A deceptive and gruelling environment, the deadly extent of its pitfalls was brought into sharp and shocking focus on Saturday 13 July, 2013.

Early morning, three supremely fit, experienced soldiers set off on a 16-mile timed march.

It was a relatively short exercise in a series they had volunteered to undertake in a quest to being accepted into “The Regiment”.

None of them made it back.

A month-long inquest into why these soldiers collapsed delivered a conclusion of neglect on Tuesday.

Here BBC Wales news website takes a closer look at one of Wales’ last true wildernesses, its significant role in the history of the SAS and why it is no stranger to tragedy.

464 gray line

On bank holiday weekend August 1900, five-year-old Tommy Jones left home with his father, a young Rhondda miner, to visit his grandparents’ farm in the Brecon hills.