En tapant sur google : http://www.google.fr/#hl=fr&gs_rn=1&gs_ri=hp&cp=18&gs_id=7&xhr=t&q=X%3A523.6+et+Y%3A730.6&pf=p&tbo=d&output=search&sclient=psy-ab&oq=X:523.6+et+Y:730.6&gs_l=&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.&bvm=bv.1355534169,d.d2k&fp=625aa4be81c4ecbd&bpcl=40096503&biw=1400&bih=879
Une réponse : http://forums.ubi.com/showthread.php/738021-Relic-problem-Forums
"After a little search i found the entrance at X:528.3 Y:727.8 "