By now we know that anything that’s old and rare can sell for a pretty penny. Speaking of pennies, today we thought we’d talk about money that could literally earn you thousands or millions of dollars. That is, of course, if you can find them in old pockets, wallets, or collection boxes!

If you’ve inherited an old collection of money from a relative, you might not want to part ways with it, but you could unknowingly own coins or bills that are incredibly sought out by collectors all around the world.

Here are 12 coins and bills that you didn’t know are worth a fortune!