▁as ▁French ▁Bas que ▁Country ▁or ▁Pays ▁bas que . ▁Its ▁entire ▁territory ▁extends ▁around ▁the ▁axis ▁provided ▁by ▁the ▁river ▁Saison , ▁known ▁in ▁Bas que ▁as ▁U h ait za , ▁that ▁flows ▁from ▁south ▁to ▁north ▁until ▁it ▁joins ▁the ▁river ▁O lor on , ▁that ▁works ▁as ▁a ▁border ▁between ▁Sou le ▁and ▁Bé arn . ▁ ▁Sou le ▁includes ▁three ▁ge ographical ▁regions : ▁the ▁low lands ▁at ▁north ▁on ▁a ▁territory ▁known ▁as ▁P ett ara ▁or ▁Lower ▁Sou le , ▁a ▁forest ▁region ▁known ▁as ▁Ar b ail a ▁and ▁the ▁high lands ▁at ▁south , ▁in ▁a ▁region ▁named ▁Bas ab ür ü a ▁with ▁a ▁highest ▁peak ▁at ▁ 2 , 0 1 7 ▁meters ▁at ▁the ▁Pic ▁d ' Or hy . ▁ ▁O ro graph y ▁▁ ▁Sou le ' s ▁or ography ▁div ides ▁into ▁three ▁regions : ▁the ▁northern ▁low lands , ▁made ▁up ▁by ▁extensive ▁pla ins ; ▁the ▁central ▁region , ▁which ▁is ▁fairly ▁h illy ▁and ▁the ▁southern ▁high lands , ▁which ▁are ▁part ▁of ▁the ▁north western ▁Py ren ees , ▁with ▁alt itudes ▁reaching ▁up ▁to ▁ 2 , 0 1 7 ▁meters ▁above ▁sea ▁level ▁at ▁the ▁Pic ▁d ' Or hy . ▁ ▁In ▁the ▁Py ren ees , ▁from ▁west ▁to ▁east , ▁the ▁first ▁peak ▁is ▁the ▁Pic ▁d ' Or hy , ▁above ▁ 2 , 0 0 0 ▁meters ▁and ▁the ▁fourth ▁highest ▁peak ▁in ▁the ▁Bas que ▁Country