They are an absolutely great architectural feature. I hope this will not be boring for you , but my inspirational "stair" file is growing and I would like to publish every stair possible. I am sure, with your help, I will be adding to this post continuously.
So if you have some interesting tips, please let me know and I Thank You in advance.
Photo via Phoebe Howard -Mrs. Howard
Thanks Cote de Texas - photo from Michael Smith's new book -Houses
Catherine Martin house in Sydney (photo Vogue living Australia) .Thank you- Hopeful for Happy -for your tip .
Images from Marley&Lockyer Thank You a lot !
Tori Golub 
Bandongrove Estate Byron 
Victoria Hagan
Steven Randazzo 
Photo VT Interiors
Diamond Baratta Design 
Allan Greenberg Architect