American 25-Cent Bill
Americans usually associate bills with whole-number amounts of money and coins with decimal amounts of money. But back in the day, when a dollar was worth much more than it is today, this bill existed.
Poke Around and You Might Find One
If you look hard enough, you'll be able to find one of these floating around to this day. They're still valid forms of currency, even though the vast majority of cashiers will probably think they're fake.