Not on my property but nearby.
Back in 1974, I was walking an abandoned rail bed that passed through an old strip mine. I came up on a crowd of people standing next to a flooded stripping pit. They were looking at a green glow coming from the bottom of the pond. Word spread that a UFO had crashed into the pond.
The police were called and it created quite a stir until scuba divers recovered an old railroad lantern. It turned out to be a hoax created by a couple of boys who threw the lantern in and claimed they saw a UFO crash into the pond. Even so, the story got out and created a conspiracy theory which survives to this day.
Every year, the town of Carbondale has it's "Carbondalien Festival" which just celebrated it's 50th anniversary.