The disagreement centers on whether the group should be allowed to build a visitors center on the grounds of the spectacular Vanderbilt mansion The Breakers, a national historic landmark. The Preservation Society of Newport Country, which owns The Breakers and several other mansions in the wealthy resort town, says it wants to build the visitors center in a little-used portion of the grounds to better serve its 400,000 annual visitors with improved ticketing and restroom facilities, as well as a place to buy pre-made sandwiches and refreshments.