 The two hills of the island , the western and the eastern , have five rock @-@ cut caves in the western part and a brick stupa on the eastern hill on its top composed of two caves with a few rock @-@ cut cisterns . One of the caves on the eastern hill is unfinished . It is a protected island with a <unk> zone according to a <unk> issued in 1985 , which also includes " a prohibited area " that stretches 1 kilometre ( 0 @.@ 62 mi ) from the shoreline . 
