TSTHALBDHAL

This office building contains a stairway with a landing. The landing is roughly 5' 1/2" up the stairs, so that pedestrians who view the stairs from across the street do not see the landing, since it is at eye level. The landing is only revealed upon climbing the stairs. This curious illusion accounts for the nickname "TSTHALBDHAL" - The Stairs That Have A Landing, But Don't Have A Landing.