mining ruin. This miner's hut has been artfully refurbished with all the modern conveniences. Nearby stand ruins of other rock huts--two-room falling-down houses without their roofs.
The Buddha refers to our six senses as a ghost town. Specifically he is referring to our internal senses, which I would call the virtual reality of our thoughts. We see/hear/feel our thoughts and take them to be reality. But when you look more closely, you find only empty huts of seeing thoughts, empty huts of hearing thoughts, empty huts of feeling thoughts. All here and gone in a flash. But continuous enough to feel real, to feel that we ourselves have some reality.
But really, it's all a ghost town.