Robert Wadlow, World's Tallest Man roadsideamerica.com Robert Wadlow, World's Tallest Man, Alton, Illinois Robert Wadlow, World's Tallest Man, Alton, Ill. http://www.roadsideamerica.com/story/2086 http://www.roadsideamerica.com/story/2086 http://www.roadsideamerica.com/story/2086 Robert Wadlow, World's Tallest Man, Alton, Ill.