The University of Chicago will be closing its Yerkes Observatory, on the north shore of Geneva Lake, at summer's end. "The university's astronomical research now takes place in Chile, using the Magellan and Giant Magellan telescopes, the office said.
The university has no specific plans for the property and has not met with any potential buyers, David Fithian, executive vice president of the university, said in the News Office release."
A forty-inch refracting telescope is still a pretty big deal, although radio telescopes and large reflecting telescopes, including orbiting ones, are the more useful research tools.
Presumably, that closing will also mean the end of race managers at the Lake Geneva Yacht Club being able to confirm sunset times with the observatory. (There's probably an app for that these days.)
I've seen occasional suggestions from developers to build town houses or such on the observatory grounds.