In History Optional paper I, mapping of historical sites is very important question. Three years ago this question was supposed to be "scoring one", as mapping of sites was relatively easy. But now days sites which are asked are so unknown, that is not so scoring.
But I am enlisting different historical sites here, which are taken from syllabus of Diploma in Archaeology, conducted by archaeological survey of India. Just collect some information of these sites and be aware of geographical location of these different sites. And also do mapping from spectrum book of historical sites. But concentrate more on enlisted sites as current trend of UPSC is to ask sites related to neolithic, chalcolithic and megalithic era, or sites which are recently discovered.
IMPORTANT SITES FOR HISTORY MAIN PAPER I