The two world tropic lines are the Tropic of Cancer and the Tropic of Capricorn. The Tropic of Cancer is located at 23.5° north latitude, and the Tropic of Capricorn is located at 23.5° south latitude. Together, these two lines mark the northern and southern boundaries of the tropics, which are the regions of the Earth located between the Tropic of Cancer and the Tropic of Capricorn.