While I might be slightly squeamish about staying in Austrian Andreas Strauss’s open-to-the-public, semi-outdoor, pay-what-you-want dasparkhotel, I love the idea of using drain pipe sections as small outdoor structures. I have no idea if it’s really all that cost-effective. My guess is that the pipe itself is pretty cheap, but getting it where you want it to be is not. But high cool points.
Drain Pipe Hotel