There have been some extravagant photos of cool staircases and their unique step designs as shown here. Even if the common spiral staircase proved to be just mundane but the way they look can be absolutely beautiful.
Being expanded on that theme, these 22 coolest examples of staircases and step design could hopefully quench your thirst of fanciful stair designs.
But based on many facts about staircases, the most important thing about non-aesthetic design elements of a staircase is its space.
Normally, what most designers do to the space under the stairs is that they will make good use of such space for functionable usage, but if the designer fails to figure out a good way to use the space, a lot of space will be taken up for no good reason at all.