Six Bank Robberies That Were Never Solved

Banks are where the money is, but people don't often rob them because 1. it's wrong, 2. there are security measures, and 3. if you could pull it off, the long arm of the law will find you, and the consequences will be severe. But every once in a great while, someone does pull it off and gets away with it.  

A bank robbery in Krugersdorp, South Africa, in 1977 seems like something you'd see in a movie. The perpetrators rented a building next door to the bank, and dug a tunnel to the bank vault. Noisy construction equipment outside covered up the sound of the digging equipment inside. The extra noise also tended to trip the bank's alarm system, so bank employees turned it off. All of this came to light after the money was gone, and neither it nor the thieves were ever found.

Read the details of this story and of five other famous unsolved bank robberies at Mental Floss. But keep in mind that just because these schemes worked once, that doesn't mean they will work again.