They are there because they were arrested in Afghanistan on suspicion of being involved with the terrorist outfit al-Qaeda.
But some people, like the human rights group Amnesty International, are protesting to the US that the conditions they're being kept in aren't good enough.
There are international laws which say prisoners of war must be treated humanely.
The Red Cross and a team of British officials are visiting the camp to check on conditions there.
The US military insist the men in the pictures had just landed at the base and prisoners were normally free to walk around their cells.