As with steam locomotives themselves there were all different sizes of towers and they became much larger into the 20th century. Some of the last towers ever built were from reinforced concrete and stood hundreds of feet tall. Today, of course, the structure’s purpose has long since ended. However, several of the last towers constructed were so well built that several still stand to this day, over a half-century since they were last used!
Photo courtesy of Dan Grudzielanek.