First, go to the Blockland Fourms homepage.
Then look under files, and click on "Maps".
After that, choose a map that you would like to download out of the many listed.
There should be a link of some sort in the first post. Click on that. This should result in opening a new page.
Most of the time, this page is a mediafire page. It has a "click here to download" link that should be very noticeable on it.
Something should pop up saying 'do you want to open or save this file?'. Click save.
For a location for the file to be, find your blockland folder. (This should be where you installed blockland originally. The normal place is C:\Program Files\Blockland.)
Go into your Blockland folder, then into the add-ons folder. Save the file there.
After this, start up Blockland. Ta-da! The map should be working, wether you join a server or create one!
[END OF TUTORIAL]