fotofacade.com
A photographer with a background in building conservation, Briton Andy Marshall displays a keen eye and a clear love of things architectural, both old and new, on his blog.
colourlovers.com
This robust site?which offers a blog, forums, articles, growing databases of patterns and colors, and more? stays on top of color trends for the benefit of all designers.
deadmalls.com
Per Wikipedia, a dead mall has high vacancies, low consumer traffic, or is deteriorating. Given recent economic struggles, this site about U.S. retail history will have many new entries.
babelstone.blogspot.com/search?q=tower
Among the best known Biblical structures, the Tower of Babel has proved a mutable subject for artists. See the many ways it has been depicted over the centuries.