High ridgelines are found throughout the Town, but primarily are located in the northern districts designated as AR5 and C. These ridgelines and hilltops are exceptional aesthetic and ecological resources, visible from many perspectives and distances, and typify Clinton's rolling, often rugged, rural topography. The Ridgeline Protection Overlay Area includes lands that are 500 feet or more above sea level. The Scenic and Historic Protection Overlay includes the Taconic Parkway Viewshed, the hamlets included on the Town Zoning District Map and Clinton's seven Critical Environmental Areas. The Taconic Viewshed is defined as lands in the Town of Clinton which are within 3,000 feet of the paved surface of the Taconic State Parkway. This viewshed is a critical part of Clinton's rural scenery, is the first introduction to Clinton for many travelers, and is frequently viewed by residents of the Town. Clinton's hamlets have historic value and are important to the character of the Town. Their location and boundaries are shown on Clinton's Zoning District Map. Clinton's Critical Environmental Areas have been designated by the Town Board to have scenic, environmental, cultural or historic characteristics which merit special protection. Other areas which offer exceptional viewsheds frequently enjoyed by residents and visitors and/or contain structures or sites of historic importance may be designated as part of the Scenic and Historic Protection Overlay by the Clinton Town Board.