I'll start this sad-excuse-for-a-blog off with some old links from my "Favorites". You've probably already heard of these, so bear with me. New stuff will be coming soon.
The world's biggest grain silo - grain + some sort of artist + microphones, speakers, and an internet conncection = The Silophone The silophone is a wonderful place, and a horrible addiction. You either speak, or play sounds inside of the worlds largest grain silo, and then listen to the echos. The echos last for around 20 seconds. Even the "Meow Mix Song" sounds beautiful when played inside of it.