Somerset is a rural county of rolling hills, the Blackdown Hills, Mendip Hills, Quantock Hills and Exmoor National Park, and large flat expanses of land including the Somerset Levels. There is evidence of human occupation from Paleolithic times, and of subsequent settlement by the Celts, Romans and Anglo-Saxons. The county played a significant part in Alfred the Great's rise to power, and later the English Civil War and the Monmouth Rebellion. The city of Bath is famous for its Georgian architecture and is a UNESCO World Heritage Site.