of a box weave of varied colours. These weaves are known as donegal tweeds (with a small 'd') and are world-renowned. There is a sizeable minority of Ulster Protestants in County Donegal, and most Donegal Protestants trace their ancestors to settlers who arrived during the Plantation of Ulster throughout the 17th century. The Church of Ireland is the largest Protestant denomination, with Presbyterianism second. The areas of County Donegal with the highest percentage of Protestants are The Laggan district of East Donegal, centred on Raphoe; the Finn Valley; and areas around Ramelton, Milford and Dunfanaghy – where their proportion reaches up to 30–45 per cent. There is also a large Protestant population between Donegal Town and Ballyshannon in the south of the county. In absolute terms, Letterkenny has the largest number of Protestants (over 1,000). The Earagail Arts Festival is held within the county each July. People from Donegal have also contributed to culture elsewhere. Francis Alison was one of the founders of the College of Philadelphia, which would later become the University of Pennsylvania. Francis Makemie (originally from Ramelton) founded the Presbyterian Church in America. David Steele, from Upper Creevaugh, was a prominent Reformed Presbyterian, or Covenanter, a minister who emigrated to the United States in 1824. Charles Inglis, who was the first Church of England bishop of the Diocese of Nova Scotia, was the third son of Archibald Inglis, the Rector in Glencolmcille. Places of interest The area's attractions include Glenveagh National Park (formerly part of the Glenveagh Estate). The park is a 170 km2 (about 42,000 acre) nature reserve with scenery of mountains, raised boglands, lakes and woodlands. At its heart is Glenveagh Castle, a late Victorian 'folly' that was originally built as a summer residence. County Donegal was voted number one on The National Geographic Traveller (UK) 'cool list' for 2017, The Donegal Gaeltacht (Irish-speaking district) also attracts young people to County Donegal each year during the school summer holidays. The three-week-long summer Gaeltacht courses give young Irish people from other parts of the country a chance to learn the Irish language and traditional Irish cultural traditions that are still prevalent in parts of Donegal. The Donegal Gaeltacht has traditionally been a very popular destination each summer for young people from Northern Ireland. Scuba diving is also very popular with a club being located in Donegal Town. Education Higher education within the county is provided by