SCP-087
SCP-087 is an unlit platform staircase. Stairs descend on a 38 degree angle for 13 steps before reaching a semicircular platform of approximately 3 meters in diameter. Descent direction rotates 180 degrees at each platform.
About This SCP
SCP-087 by Zaeyde, from the SCP Wiki.SCP Foundation logoCC BY-SA 3.0