The Coastal Region is undoubtedly the most important wine producing region of the country. This is the historical heart of South African wines. Although a large appellation, the most prominent areas within this region are concentrated around the Cape Peninsula and the Northern Cape spreading across 420 miles (700 km) north to south. The coastal influence of the Atlantic and Indian Oceans is one of the most influential climatic feature that affects the wine industry in the coastal region. The overall warm climate helps to ripen the grapes during the day whereas the cold nights ensure that the flavour profiles and the acidity of the wines are maintained. Like the climate, the Coastal Region`s soil profile also varies dramatically across the landscape. These range from clay dominated, moisture retaining soils, well draining shales to calcareous and lime-rich outcrops.