Deep down here by the dark water lived old Gollum, a small slimy creature. I don't know where he came from, nor who or what he was. He was Gollum - as dark as darkness, except for two big round pale eyes in his thin face. He had a little boat, and he rowed about quite quietly on the lake; for ke it was, wide and deep and deadly cold. He paddled it with large feet dangling over the side, but never a ripple did he make. Not he. He was looking out of his pale lamp-like eyes for blind fish, which he grabbed with his long fingers as quick as thinking. He liked meat too. Goblin he thought good, when he could get it; but he took care they never found him out. He just throttled them from behind, if they ever came down alone anywhere near the edge of the water, while he was prowling about. They very seldom did, for they had a feeling that something unpleasant was lurking down there, down at the very roots of the mountain. They had come on the lake, when they were tunnelling down long ago, and they found they could go no further; so there their road ended in that direction, and there was no reason to go that way-unless the Great Goblin sent them. Sometimes he took a fancy for fish from the lake, and sometimes neither goblin nor fish came back.
Actually Gollum lived on a slimy island of rock in the middle of the lake. He was watching Bilbo now from the distance with his pale eyes like telescopes. Bilbo could not see him, but he was wondering a lot about Bilbo, for he could see that he was no goblin at all.
J.R.R. Tolkien The Hobbit
I always have insane troubles with finding anything I want to find in Goblin Town... Gollum Cave is no exception. Thankfully, goblins draw a warning graffitti at the start of the tunnel leading to the cave!