ula ▁to ▁the ▁south , ▁and ▁China ▁to ▁the ▁West . ▁ ▁The ▁terrain ▁in ▁rug ged ▁and ▁difficult ▁to ▁access , ▁with ▁heavily ▁for ested ▁ta iga ▁co ex isting ▁with ▁tropical ▁species ▁of ▁animals ▁and ▁birds . ▁The ▁park ▁is ▁relatively ▁isolated ▁from ▁human ▁development , ▁and ▁functions ▁as ▁a ▁conservation ▁reserve . ▁ ▁Tour ists ▁may ▁visit ▁the ▁port ions ▁of ▁the ▁park ▁marked ▁for ▁recre ation , ▁but ▁entry ▁to ▁the ▁protected ▁zones ▁is ▁only ▁possible ▁in ▁the ▁company ▁of ▁park ▁r angers . ▁ ▁Top ography ▁The ▁southern ▁end ▁of ▁the ▁Prim or sky ▁mar itime ▁province ▁was ▁not ▁gla ci ated ▁in ▁the ▁most ▁recent ▁ice ▁age , ▁creating ▁conditions ▁for ▁high ▁levels ▁of ▁b iod iversity . ▁ ▁Z ov ▁Tig ra ▁occup ies ▁the ▁high lands ▁at ▁the ▁southern ▁end ▁of ▁the ▁region , ▁on ▁the ▁r idge ▁of ▁the ▁S ikh ote - A lin ▁mountains . ▁ ▁The ▁Mil og rad ov ik ▁River ▁flows ▁from ▁the ▁area ▁south ▁to ▁the ▁Sea ▁of ▁Japan , ▁some ▁ 5 0 ▁miles ▁to ▁the ▁south . ▁ ▁Flow ing ▁to ▁the ▁north , ▁trib ut aries ▁of ▁the ▁U ss uri ▁River ▁make ▁their ▁way ▁to ▁the ▁Am ur ▁River ▁bas in . ▁ ▁These ▁rivers ▁drop ▁quickly ▁in ▁narrow ▁can y ons ▁with ▁rap ids ▁known ▁for ▁sudden ▁flo ods ▁in ▁the ▁Spring ▁ra iny ▁season . ▁ ▁The ▁mountains ▁are ▁rug ged ▁and ▁isolated . ▁ ▁Only ▁a ▁few ▁former ▁logging ▁roads ▁approach