These 12 Designs Are So Brilliant Perfect That They'll Change Your Life

https://www.pinterest.com/pin/433753007851992226/
https://m.9gag.com/gag/ax2jqj1

Plywood staircase by Buj+Colón Arquitectos integrates shelves and cupboards for a small flat

https://www.dezeen.com/2015/01/03/buj-colon-architects-plywood-trio-apartment-refurbish-madrid-staircase-storage/