Sixteen is a double dogleg par 5 that winds its way first left and then right around the sand barrens, stretching to nearly 600 yards.     The downhill par-3 17th is one of the toughest holes at Black Diamond and often requires a wood to reach the putting surface. The 18th sweeps dramatically uphill and is beautifully framed with pines and white sands.     Hundreds of trees and indigenous shrubs and grasses, including lantana, black pine, blackjack oak, cactus and broom sage, have been carefully replanted to augment the course. And as always at Black Diamond, the community’s luxurious homes are artfully set in stands of trees and lush landscaping, well away from the fairways. The Ranch Course. Simply captivating.