ine - West phal ia ▁en comp ass es ▁the ▁pla ins ▁of ▁the ▁Lower ▁Rh ine ▁region ▁and ▁parts ▁of ▁the ▁Central ▁U pl ands ▁( die ▁Mittel geb ir ge ) ▁up ▁to ▁the ▁g orge ▁of ▁Port a ▁West fal ica . ▁The ▁state ▁covers ▁an ▁area ▁of ▁ ▁and ▁shares ▁borders ▁with ▁Belg ium ▁( W all onia ) ▁in ▁the ▁south west ▁and ▁the ▁Netherlands ▁( L im burg , ▁Gel der land ▁and ▁Over ij ss el ) ▁in ▁the ▁west ▁and ▁north west . ▁It ▁has ▁borders ▁with ▁the ▁German ▁states ▁of ▁Lower ▁Sax ony ▁to ▁the ▁north ▁and ▁n ortheast , ▁Rh in eland - Pal at inate ▁to ▁the ▁south ▁and ▁H esse ▁to ▁the ▁sout heast . ▁ ▁Appro xim ately ▁half ▁of ▁the ▁state ▁is ▁located ▁in ▁the ▁relative ▁low - lying ▁terrain ▁of ▁the ▁West phal ian ▁Low land ▁and ▁the ▁Rh in eland , ▁both ▁extending ▁broad ly ▁into ▁the ▁North ▁German ▁P lain . ▁A ▁few ▁isolated ▁hill ▁ranges ▁are ▁located ▁within ▁these ▁low lands , ▁among ▁them ▁the ▁Ho he ▁Mark , ▁the ▁Beck um ▁Hills , ▁the ▁Ba umber ge ▁and ▁the ▁St em mer ▁Ber ge . ▁ ▁The ▁terrain ▁r ises ▁towards ▁the ▁south ▁and ▁in ▁the ▁east ▁of ▁the ▁state ▁into ▁parts ▁of ▁Germany ' s ▁Central ▁U pl ands . ▁These ▁hill ▁ranges ▁are ▁the ▁Wes er ▁U pl ands ▁– ▁including ▁the ▁Eg ge ▁Hills , ▁the ▁Wie hen ▁Hills , ▁the