You can make an outdoor fireplace with concrete blocks. It’s a relatively inexpensive way to build your own fire pit. First, you need to select the right location for it. Make sure that there is enough space around it and also close proximity to all of the materials you will be needing in order to assemble it! You should then lay out your concrete blocks on top of some bricks or another material so as not to damage any grass underneath where they are laying down flatly face up. Then, stack them together according to plan which usually consists of two rows each containing three different sized layers – one at the bottom consisting only of half-sized block, followed by full-size block above that, stacked back-to-back vertically atop one another. Then, add another layer of the full-size block at top and lay down a piece of plywood on top to construct your fireplace platform before you start building up from there!