Nantou County is the second largest county of Taiwan by area, located in the central part of the country. It is also the only non-coastal county in Taiwan. Its name derives from the Hoanya Taiwanese aboriginal word Ramtau.

Sun Moon Lake is a lake in Yuchi Township, Nantou County, Taiwan. It is the largest body of water in Taiwan. The area around the lake is home to the Thao tribe, one of Taiwan's aboriginal tribes. Sun Moon Lake surrounds a tiny island called Lalu. The east side of the lake resembles a sun while the west side resembles a moon, hence the name.