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, Maryland Company bought of land and rezoned it for the Columbia Development. In 1972, the Marriott company proposed to build a regional theme park on Rouse-owned land but was denied zoning. The county has a number of properties on the National Register of Historic Places. According to the U.S. Census Bureau, the county has a total area of , of which is land and (1.0%) is water. It is the second-smallest county in Maryland by land area and smallest by total area. Howard County is located in the Piedmont Plateau region of Maryland, with rolling hills making up most of the