Towers and masts commercial and homebrew
 

I don't have a lot of links but I'll add more as I find good ones
here are some meant to hold windmills.If your into homebrew.

http://www.otherpower.com/otherpower_wind_towers.html

and some that were deleted

http://www.rohnnet.com/concealment
http://www.rohnnet.com/guyed-towers
http://www.rohnnet.com/bracketed
http://www.rohnnet.com/towers-foldover
http://www.freeantennas.com/tilt-over-tower/index.html


any one else with links to towers please post yours

Another supplier of towers and related hardware: www.3starinc.com