May be it is the hill from where Shiv's car fell down n it may be dat his body is buried somewhere in the ice...which his spirit wants to tell sharanya so that she can reach there n locate his body.It is the place of accident n so Shiv's ghost is stressing on dat place so that sharanya can remember.
One thing more I noticed that this scary encounter made sharanya remember a bit of her past...I think dats y our ghost just wants her to recall her past n is in some way helping in bringing her memory back.
Scary sharanya when sleeps she gets those flashbacks.
Wat do u think guys?? It's just my take đ