A B-17 once landed at an airfield in Belgium without any crew on board. Just by chance it was pointing in the right direction, with the right amount of lift and drag and thrust.
This sounded like there had to be more to it but found this [1] and it makes it even weirder. > The parachutes were still onboard and no indication of gunfire or blood caused by hostile attacks were seen on the plane. [1] https://worldwarwings.com/still-unsolved-story-of-b-17-landi...
That the plane landed intact is pretty cool though!
[1] https://www.quora.com/What-happened-to-the-crew-of-the-B-17-...