Difficult to tell from this photo , a lot depends on the location and / or strategic position
Could be prehistoric round barrows. Need some more info on where it is etc to make any sort of call on this, as Paul has already stated.
Whatever its just an opinion.
it's 1mile away from the santa pod airfield, if this helps, I thought maybe they are as they are close to an airfield.
'I do not think we can hope for any better thing now.
We shall stick it out to the end, but we are getting weaker of course, and the end cannot be far.
It seems a pity, but I do not think I can write more. R. SCOTT.
Last Entry - For God's sake look after our people.'
In memory of Capt. Robert Falcon Scott, Edward Wilson, Henry Bowers, Lawrence Oates and Edgar Evans. South Pole Expedition, 30th March 1912.