The land the radio telescope that first detected the microwave radiation from the big bang was in private ownership for the longest time. Luckily, it was just bought by the township to be converted into a public park with the telescope itself being preserved when the whole site was at risk of being “developed”.

edit: Source: https://holmdel-cilu.org/holmdel-horn-antenna When they open, please visit the Antenna, eat something local and let people know why you came. Make sure the township knows it was a financially good thing that they’re preserving it.