I suspect you lot may already know this site, but it's a favorite of mine
Dark Roasted Blend
Among the recent posts, check out the photos of Abandoned Power Stations.
If that's not your thing, try the companions Web Ecoist and Web Urbanist
also recommended: The Milky Way Panorama: ESO unveils an amazing, interactive, 360-degree panoramic view of the entire night sky.
Also here for closeups.