Bidzar wani wurin binciken kayan tarihi ne mai nisan kilomita 20 (12 mi) daga Guider, Kamaru, wanda yake dauke da man petrollyphs tsakanin shekara 3000 zuwa 300. Wurin, a halin yanzu yana fuskantar barazana daga aikin siminti na gida da ayyukan kera marmara, ana la'akari da sanya shi cikin jerin abubuwan tarihi na UNESCO tare da "kimar darajar duniya" ga duniya. Bidzar petroglyphs suna kusa da ƙauyen Bidzar, akan hanyar Maroua-Garoua zuwa Guider. Wani yanki na dutsen marmara wanda ya faɗi kusa da ƙauyen kusan kilomita 2.5 (1.6 mi) daga arewa zuwa kudu, da kuma kilomita 1 (0.62 mi) daga gabas zuwa yamma nuna kusan 500 siffofi da aka zana duka. Marmara iri ce mai ɗauke da laƙabi da ake kira cipolin; yana da madaidaicin abun da ya shafi zane-zane, yana da ƙarancin juriya ga gogayya da warware sauƙi. An zana siffofi a cikin marmara ta amfani da guduma da kayan aikin zane. Alƙaluman yawanci tsarin lissafi ne, wanda ya ƙunshi ƙungiyoyin da'ira, wasu sun ware wasu kuma rukuni-rukuni.