Backyard Designs

I have recently got back into website design and I am really wanting to learn hardcore CSS. I have seen some really nice websites out there that are really creative, and all seem to be created with CSS. If I am wrong then please let me know…. ? I have been using a few things like Photoshop CS4 and Dreamweaver, but CSS is rather new to me as a learner for what I am trying to create. I have already discovered the CSS zen garden, but I want other resources that offer out VERY high quality css templates for free for me to try and learn from. Please post your best answers below….

Hi I am looking for best software which can create easy to make professional looking 3D landscaping and Garden designs. The software should have everything ready to copy paste or insert for making designs. Their should be option to give the size according to our need and use curves and slops.
Also looking for websites which has photos of landscape garden patio designs free download.

Thanks for all who answers.