This is the staircase inside an office building called Messberghof in Hamburg, Germany. During World War II, a major supplier of the poison Zyklon-B resided in this building. Zyklon-B was used by the Nazis for mass executions in concentration camps.
The building is originally ten stories high. I made the staircase look infinite and named my work Stairway to Hell, as it was proposed by a viewer in another photography community.