▁mag ical ▁pass ages ▁hidden ▁behind ▁paint ings , ▁stat u ary , ▁and ▁furn iture . ▁ ▁Games ▁In ▁role - play ing ▁games , ▁secret ▁pass ages , ▁like ▁tra ps , ▁can ▁be ▁found ▁in ▁all ▁sorts ▁of ▁buildings , ▁especially ▁in ▁d unge ons ▁and ▁cast les ▁in ▁high ▁fant asy ▁role - play ing ▁games . ▁The ▁m ansion ▁in ▁the ▁board ▁game ▁Cl ued o ▁( Cl ue ) ▁has ▁two ▁secret ▁pass ages ▁that ▁players ▁can ▁use ▁to ▁move ▁to ▁an ▁opposite ▁corner ▁of ▁the ▁board . ▁ ▁Computer ▁and ▁video ▁games ▁often ▁feature ▁hidden ▁areas , ▁sometimes ▁as ▁an ▁important ▁part ▁of ▁the ▁game ▁and ▁other ▁times ▁as ▁an ▁E aster ▁egg . ▁Such ▁areas ▁can ▁be ▁a ▁required ▁route ▁in ▁order ▁to ▁continue ▁or ▁may ▁be ▁optional ▁and ▁contain ▁re wards ▁for ▁the ▁player , ▁such ▁as ▁a ▁bonus ▁stage , ▁a ▁secret ▁character , ▁extra ▁items ▁or ▁a ▁shortcut ▁to ▁a ▁later ▁part ▁of ▁the ▁game . ▁Some ▁secret ▁ent ran ces ▁are ▁invisible , ▁such ▁as ▁a ▁normal - looking ▁wall ▁that ▁can ▁be ▁walked ▁through , ▁while ▁others ▁give ▁a ▁slight ▁visual ▁clue , ▁such ▁as ▁a ▁cave ▁behind ▁a ▁water fall . ▁ ▁See ▁also ▁Parent ▁categories : ▁ ▁Rock - cut ▁architecture ▁ ▁Sub ter rane a ▁( ge ography ): ▁under ground ▁structures ▁ ▁Under ground ▁city , ▁um bre lla ▁article ▁for ▁under ground ▁dwell ings ▁and ▁facilities ▁ ▁Under ground ▁living ▁ ▁Secret ▁rooms ▁and ▁pass