Mar-a-Lago (/ˌmɑːrəˈlɑːɡoʊ/) is a resort and national historic landmark in Palm Beach, Florida, built from 1924 to 1927 by cereal-company heiress and socialite Marjorie Merriweather Post. The 126-room, 62,500-square-foot (5,810 m2) mansion since 1994 contains the Mar-a-Lago Club, a members-only club with guest rooms, a spa, and other hotel-style amenities. It is located in Palm Beach County on the Palm Beach barrier island, with the Atlantic Ocean to the east and Florida's Intracoastal Waterway to the west.