Before heading off to fight in the Civil War in 1862, a Michigan pharmacist named James Vernor combined 19 ingredients to make a new elixir and hid the stuff in an oak cask in his store. When he got back from fighting the no-good Rebs four years later, Vernor opened the barrel, poured himself a mug of the aged concoction and viola! Vernors, the nation's first pop, was born.
For 45 years, 233 Woodward Avenue in Detroit, Michigan was the only place on Earth where you could get Vernor's magical pop, which is what we call it here. So whenever anyone engages you in that insipid "pop vs. soda" argument, point to the fact that "pop" originated in Michigan and send the dissenting party crying to his or her mama.
Vernors, which is kind of like a cross between ginger ale and cream soda, may be difficult to find at the local 7-11, but it's still around today. (And still aged four years in those oak casks.) On the 100th anniversary of the beverage's creation, in 1966, Vernor's great-grandson sold the brand, which has changed hand a number of times in the ensuing decades, eventually becoming part of Cadbury Schweppes' Dr. Pepper/Seven Up subsidiary.