Castle Howard by Hawksmoor. The grounds of Castle Howard are also used as part of at least two charity running races during the year. Located on the Estate, but operating separately to the house and gardens and run by an entirely independent charitable trust, is the Yorkshire Arboretum. Originally created through the enthusiasm and partnership of George Howard (Lord Howard of Henderskelfe) and James Russell, over a period of eighteen years, from 1975 to 1992, it was opened to the public for the first time in 1999 and a new Visitor Centre opened in 2006.The arboretum's extensive and important collection of 6,000
Howard County Conservancy Howard County Conservancy The Howard County Conservancy is a non-profit land trust that operates a nature center in Woodstock, Maryland. It is located at the 300-year-old, Mt. Pleasant Farm. The center was founded in 1990 as a private land trust with the goal of protecting and preserving farmland and historic sites in Howard County. The conservancy currently manages legal easements on 1,600 acres of land. In 2014, the conservancy started a second nature center at Belmont Manor. The Mt. Pleasant farm dates back to 1692 when Patuxent Ranger Thomas Browne II built a log house on a land grant "Ranters