The Nandhaur area is the sub-landscape flanked by River Gola in the west and River Sharda in the east and intersected by River Nandhaur which flows east to west in the northern area and then turn south to cut  the  landscape  into  two  before  disappearing  in  the  tarai  area.  Though  there  are  many  rivers  in  this landscape, but Nandhaur is the most significant among them and also is the only one which is perennial with  substantial  water.

It  also  has  large  swathes  of  undisturbed  forests  which  have  virtually  no habitation.  It is a critical  link  for the wildlife populations to move across the Tarai  Arc Landscape and therefore  makes Nandhaur landscape declared  as  a wildlife sanctuary