You are thinking of the Antarctic Circle.
The Bolivian city of Camiri lies very near the 20 degree south latitude line. This line of latitude also passes through the South American countries of Chile, Paraguay, and Brazil.
Every degree of latitude -- circles -- on earth is north of the South Pole. Notably, these include the Antarctic Circle -- 66° 33′ 44″ South, the Equator -- 0° and the Arctic Circle -- 66° 33′ 44″ North.
Tundra biomes generally occur near the Arctic Circle, between 60° to 75° latitude in the northern hemisphere. In the southern hemisphere, tundra biomes are found near the Antarctic Circle, between 60° to 75° latitude.
The demarcation line between North and South Korea is located near the 38th parallel. This line essentially divides the two countries along the latitude of 38 degrees North.
You can draw a straight line in, on or near a circle but it cannot be a part of a circle.
Pikes Peak in Colorado is near the 39th parallel north, which is not a line of latitude, but it's approximately between 38 and 39 degrees north latitude.
Most rain forests are found near the equator, between the Tropic of Cancer (23.5 degrees north) and the Tropic of Capricorn (23.5 degrees south). This region is known as the tropics and has the ideal climate for rain forests to thrive due to high temperatures and abundant rainfall.
American Samoa is located in the southern hemisphere and near the equator, closer to the Tropic of Capricorn. It is situated in the Pacific Ocean, east of the International Date Line, and its coordinates range from approximately 11 to 14 degrees south latitude and 169 to 172 degrees west longitude.
The capital of Mexico
Rockhampton, located in Queensland, Australia, is situated near the Tropic of Capricorn, which is at approximately 23.5 degrees South latitude. This line of latitude marks the southernmost point at which the sun can be directly overhead at noon during the summer solstice. As such, Rockhampton experiences a subtropical climate influenced by its proximity to this latitude.
equator
They are pretty close in latitude; Poughkeepsie, NY is at 42 35N, while Omaha is at 41 14N.