A historic estate in East Hampton has gone on the market with one of the highest list prices of the year. The 11.2-acre, $140 million property is occupied by two homes perched on a knoll with views from their wide back porches of Georgica Pond and the distant Atlantic Ocean. Built for a prominent New York City surgeon in 1931, the six-bedroom, 10,000-square-foot main home—named Shepard Krech House—is one of only six homes included in the Briar Patch Road Historic District.

On the National Register of Histor…