The public is invited to an open house Saturday from 1:00-10:00 p.m. at The Nature Conservancy's Whitney Preserve. The Conservancy is celebrating the preserve's 15th anniversary as well as the grand opening of Bev's Bunkhouse, a new multi-purpose facility that will be made available free of charge to students, researchers, conservationists and nature-inspired groups. Corissa Krueger, program coordinator for The Nature Conservancy, visited about Whitney Preserve and Saturday's open house.