If you are looking to build a permanent masonry fire ring, leave air intakes at the bottom. If you really want a healthy fire, build a grate so the fuel can breathe even more.
Great topic. None of these are mine, I don't have a fire pit, but would like one someday.
I like the idea of this, seeing the flames through the cutouts of the animals, very cool effect:
I made this out of some stone I liberated from a mountainous region I frequent when camping. The trick is, if you don't want your pit to explode, use fire-resistant rocks. I know that's not a thing, but some rocks will explode/pop when exposed to sustained heat. When researching how to build one (I gave up on trying to cement/seal the thing. I just stacked the stones), it was mentioned to use a certain type of brick to surround the inner portion of the pit as to prevent pavers, cinder blocks, etc. from popping/cracking/exploding.
I forget what they're called, but it's something to look into if you don't have an abundance of "campfire/bonfire proven" rocks to work with.
Just finished this up today.
We need the "fire in the pit" pic to finalize the installation.
I showed my wife the roasters and she had to laugh, but she wants a set. I think she was eyeballing the weenie.