Could this insane Connecticut property break the record for the most expensive residential property ever sold in the country? Now on the market for $175 million, Great Island spans 63 acres and holds a mansion, beach cottages, a polo field, caretaker’s house with a greenhouse, yacht basin with docks, and a cow barn to boot. Such an impressive estate is owned by the family of the 19th-century industrialist William Ziegler. He acquired it in 1902 to use as a summer destination–one that rivals any other “summer house” we’ve seen. And according to The Real Deal, if this sells for its full asking price it would beat the record for priciest house ever sold in the U.S., which belongs to the 2014 sale of a $147 million home in the Hamptons.