In Korea, Buddhist temples are abundant. Many of the oldest and most famous temples are located high up in the mountains, where Buddhist monks and nuns live, meditate and study. Others are located in urban areas where they can be visited regularly by lay Buddhists. Buddhists go to temples to spend time in quiet meditation, for Dharma (study), to offer prayers and donations, to share in Sangha (community) and to celebrate important dates in the Buddhist calendar. Many temples have beautiful architecture, statues, paintings and pagodas, some dating back more than 1000 years. Most Korean temples have names ending in -sa (사), which means "temple.