More to explore:
Concrete block bench- cheap too!
DIY pallet bench + planter
Dreaming of Concrete Blocks: Raised Beds, Planters, Tables, and Benches Oh My! ~ A Minneapolis Homestead
$30 concrete bench
that's kinda neat looking .... the tricky part would be splitting the block for the top part, the succulents are perfect for this set up
I've seen something like this done with herbs. I can grow basil in the house like crazy but not parsley, don't know why.
cinder block planters
Easy and Inexpensive Ideas for Outdoor Rooms