archatlas:

The World’s Most Spectacular Staircases

Identified from the top:

• Rainbow Staircase Batu Caves Temple
  
• Chand Baori 
  
• Gaztelugatxe 
  
• Infinite Staircase Olafur Eliasson 
  
• Bramante Staircases Vatican Museums 
  
• Escadaria Selarón
  

Read more information about each featured staircase following the source link.