alai minar, unfinished tower build by alauddin khilji, qutub minar, delh

alai alauddin ancient arabic architectural architecture art asia asian brick build building city column culture day delh delhi destination facade famous heritage historic historical history india indian islam islamic khilji landmark minar minaret monument mosque mughal muslim new old pillar place qutab qutb qutub red religion sandstone stone structure tall tourism tourist tower travel unesco unfinished