The Symbolic Tower of the Tropic of Cancer is one of only four examples of this kind of tower in the world. Built halfway up the Jilong mountain north of Shantou University, it is an important site developed by the city of Shantou to popularize scientific education among young people. The Symbolic Tower is made up of a support structure in the shape of the Chinese character '北' (bei, north) which is holding up a globe of the Earth. At 12 noon on the summer solstice each year, the light from the sun will shine directly through the center of the sphere to the ground below. At this time of year the Symbolic Tower is well worth seeing.