Setting aside all practicality, this steel staircase by Italian architect Francesco Librizzi is something else!
Librizzi's design studio built this striking sculptural element for a tiny home (45 square meters) in Milan that still features many original details, including a beautiful hexagonal tile floor.
The staircase (or more accurately, ladder) leads to an airy sleeping loft. I'm not sure if I could ever climb those stairs in bare feet, but kudos for creative thinking within a small space.
Via Design Milk
(Images: Giovanna Silva via Domus)