This slightly sunken backyard gym covered in charred cedar, while the interior is covered in birch panels with a mirrored wall on one end to brighten the space, make it feel larger, and let people who are exercising check their form.
I like the angle braces. I think I'd add extra stability on the bottom with a larger base. Also, add the pull-up bar to the top. - Tap the pin if you love super heroes too! you will LOVE these super hero fitness shirts!