West of Prospect Park  and south of Grand Army Plaza is Park Slope. Once known as the “Gold Coast,” the area is home to one of the country’s largest concentration of Victorian brownstones. Park Slope fell on hard times after World War II, but has been on the upswing since the 1970s.
The main commercial thoroughfares are 7th and 5th Avenues, while most of the neighborhood’s prettiest brownstones are on the side streets between Prospect Park and 6th Avenue. Carroll Street and Montgomery Place are especially worth a gander.
The Montauk Club (25 8th Ave., at Lincoln), is one of Park Slope’s finest buildings. It’s an eclectic Venetian palace with a frieze depicting the history of Long Island ’s Montauk Indians.