I don't know what it is about water towers but when ever I am traveling I always look for them in the landscape. I am definitely attracted to the shape and structure. When I am designing I use a similar shape, maybe there is a connection? Here are some I found for my shopping list. You can find the list of other bloggers who make Saturday lists in the right sidebar of Charlotte's blog. Cheers......
Watertower Letterpress Greeting Cards by all along press
Marching Water Towers - Mens Burgundy M, L, XL by live poultry
Detroit Watertowers silkscreened necktie by toy breaker
Watertower Black and White Photograph by Lauren Jung