The V.I. Park Friends sponsor "A Piece of Ireland in the Danish West Indies" from 9 to 11 a.m. on St. Patrick's Day. Historian David Knight leads a visit to the ruins of Leinster Bay and Annaberg plantations. Meet at the Annaberg Plantation parking lot. Bring water and wear hiking shoes. Fee is $20 for Friends members, $25 for nonmembers.