Places

Here are several places free to download. To open a place go to ROBLOX Studio. Go to File>Open - Then find where you saved the place. The icon should be a little R. I've zipped the places larger than 5MB.
Format: Place Name - Creator (Filetype)

Note: All downloads are virus-free. The site scans them, and I've scanned them, and you can scan them yourself to see. I'm no hacker, nor did I exploit to get the places. If you looked hard enough you could find them right on ROBLOX.

~How to Download~
(FireFox) - Right Click "Download File", and select "Save Link As...". In the pop-up window, from the "Save as Type" dropdown list, choose "All Files".

(IE) - Click "Download File", Save.