one-third of protected land in the state, and the Virginia Department of Conservation and Recreation manages over in forty Virginia state parks and in 65 Natural Area Preserves, plus three undeveloped parks. Breaks Interstate Park crosses the Kentucky border and is one of only two inter-state parks in the United States. Sustainable logging is allowed in 26 state forests managed by the Virginia Department of Forestry totaling , as is hunting in 44 Wildlife Management Areas run by the Virginia Department of Wildlife Resources covering over . The Chesapeake Bay is not a national park, but is protected by both state and federal legislation and the inter-state Chesapeake Bay Program, which conducts restoration on the bay and its watershed. Cities and towns Virginia is divided into 95counties and 38independent cities, which the U.S. Census Bureau describes as county-equivalents. This general method of treating cities and counties on par with each other is unique to Virginia; only three other independent cities exist elsewhere in the United States, each in a different state. The differences between counties and cities in Virginia are small and have to do with how each assess new taxes, whether a referendum is necessary to issue bonds, and with the application of Dillon's Rule, which limits the authority of cities and counties to countermand acts expressly allowed by the General Assembly. Within counties, there can also be incorporated towns, which do operate their own governments, and unincorporated communities, which do not. There are no further administrative subdivisions, such as villages or townships. Over three million people, 35% of Virginians, live in Northern Virginia, which is part of the larger Washington metropolitan area and the Northeast megalopolis. Fairfax County is the most populous locality in the state, with more than 1.1million residents, although that does not include its county seat Fairfax City, which is one of the independent cities. Fairfax County has a major urban business and shopping center in Tysons Corner, Virginia's largest office market. Neighboring Prince William County is Virginia's second most populous county, with a population exceeding 450,000, and is home to Marine Corps Base Quantico, the FBI Academy and Manassas National Battlefield Park. Loudoun County, with its county seat at Leesburg, is the fastest-growing county in the state. Arlington County is the smallest self-governing county in the U.S. by land area, and has considered reorganizing as an independent city due to its high density. Richmond