Another answer to this riddle.
Hint,
"Which door to pick, which door to pick" Pick = Ice pick.
"
in your sight
" = I see. IC = Icy (Water)
Hint also is. "Can you find it." Anagram:
a) FOUND IT AN ICY
b) I (1) DAFT ICY NOUN
c) I NOD AT ICY FUN
Therefore, apart from the obvious, I suggest ?'Water'. Icy water.