Petit Trianon | Lake Ronkonkoma, Long Island, NY. William K. Vanderbilt II built the Long Island Motor Parkway (opened 1908). He commissioned John Russell Pope to build a first-class dining facility at the road's eastern terminus -- later named Petit Trianon. Managed by the Hotel Astor, the Peitit Trianon opened with a special dinner reception hosted by Vanderbilt 9 Jun 1911. (pictured: Petit Trianon under construction).