I don't think I would use black shower curtains to make a room look larger, but the idea is a good one. Maybe curtains the same color as the tile, or a loghter shade of taupe. Floor-to-ceiling shower curtains. Make a small bathroom feel more luxurious.
The Art Of Up-Cycling: DIY Outdoor Furniture Ideas,Upcycled Out Door Furniture Ideas Pallet garden furniture, is a great eco friendly way to create diy out door furniture that will also be a conversational piece.