This is the resting place of Hussain (may Allah be pleased with him) in Karbala. He was the son of Ali (may Allah be pleased with him) and the grandson of the Prophet Muhammed (peace and blessings of Allah be on him).
(more to follow)
Note that this entry has been shown for information purposes only. On no account should anybody pray towards a grave or seek supplication through them as this is tantamount to committing shirk, associating partners with Allah (Glorified and Exalted is He)