Curtilage of a home v. open fields doctrine

Is that a city park being sold as private property there? It's all about property and how the owner chooses to configure it. But the new owner is only interested in land, and obviously has serious concerns about the structural integrity of the home and/or the clouded title to the second lot.

Once listed for $14 million, suburban Chicago home sells for about half the price: Buyer closes $6.8 million deal, plans to tear down and build new

The home sits on a double lot and 1.59 acres on Lake Michigan, an attractive draw for buyers looking for new development. ... The seller used the second lot for a sculpture garden, featuring contemporary works from artists such as John Henry, who has a towering blue steel sculpture on Chicago’s lakefront called “Chevron.”

There was no indication without digging into property deeds, that the second lot as an "open field" pertained to the home on the first, and wasn't a city-owned public park on the lake, if the alleged owners had any objections at all to people using it as such.

There's a high water mark with a public beach easement, and it's not really that easy to fence off lakefront or keep boaters, fishermen, picnickers and sunbathers off your land. If you want to enjoy your lakefront, you'd better be friendly and sociable with visitors.