I'd create a place where I could be alone, undisturbed by any person, society, or technology. It would be high up into the mountains, and there would be a small stream, by which would be a tiny stone cottage. Inside, in the main living area, would be where I would keep all of my books, old scientific instruments, papers, it would have a wood stove in the center of the room, and an old worn out desk with a soft, overstuffed leather chair in the corner. It would have a small bedroom, tiny kitchen (with an old well hand pump faucet), and a bath, just for personal needs.
Outside, in the front, would be an old wooden rocking chair, the front of the cottage would face the Sun, and by day I could read my books, feel the warm breeze, and sit by the stream, dipping my feet in the cold, clear water. I'd listen to the birds sing and chirp, watch squirrels alight from tree branch to tree branch. At night, I could lay outside and watch the stars, light a crackling fire, or be inside and sit in my chair, and by lantern light write my papers or study my books, my dog asleep by my chair, happy and content, and I could go to this place any time I wanted.