▁and ▁they ▁are ▁not ▁always ▁visible ▁above ▁ground . ▁Such ▁sites ▁have ▁to ▁have ▁been ▁deliber ately ▁constructed ▁by ▁human ▁activity . ▁ ▁They ▁range ▁from ▁pre histor ic ▁standing ▁stones ▁and ▁bur ial ▁sites , ▁through ▁Roman ▁remains ▁and ▁medieval ▁structures ▁such ▁as ▁cast les ▁and ▁monaster ies , ▁to ▁later ▁structures ▁such ▁as ▁industrial ▁sites ▁and ▁buildings ▁constructed ▁for ▁the ▁World ▁Wars ▁or ▁the ▁Cold ▁War . ▁ ▁For ▁ease ▁of ▁reference , ▁lists ▁of ▁scheduled ▁monuments ▁in ▁the ▁county ▁are ▁organ ised ▁by ▁local ▁authority ▁area : ▁ ▁Bath ▁and ▁North ▁East ▁Som erset ▁▁ ▁Bath ▁and ▁North ▁East ▁Som erset ▁( comm only ▁referred ▁to ▁as ▁B AN ES ▁or ▁B & N ES ) ▁is ▁a ▁unit ary ▁authority ▁created ▁on ▁ 1 ▁April ▁ 1 9 9 6 , ▁following ▁the ▁abol ition ▁of ▁the ▁County ▁of ▁Av on . ▁Bath ▁and ▁North ▁East ▁Som erset ▁occup ies ▁an ▁area ▁of ▁, ▁two - third s ▁of ▁which ▁is ▁green ▁bel t . ▁B AN ES ▁st ret ches ▁from ▁the ▁out sk ir ts ▁of ▁Br istol , ▁south ▁into ▁the ▁M end ip ▁Hills ▁and ▁east ▁to ▁the ▁southern ▁C ots w old ▁Hills ▁and ▁W ilt shire ▁border . ▁The ▁city ▁of ▁Bath ▁is ▁the ▁principal ▁settlement ▁in ▁the ▁district , ▁but ▁B AN ES ▁also ▁covers ▁Ke yn sh am , ▁M ids omer ▁N orton , ▁Rad stock ▁and ▁the ▁Che w ▁Valley . ▁B AN ES ▁has ▁a ▁population ▁of ▁