If you are writing a poem about South America, there are many defining characteristics that one could describe such as:
Size: as one of the largest continents in the world (fourth largest), South America is huge! 1/8 (one-eighth) of the worlds land mass!
Bodies of Water: South America is almost totally surrounded by water and bordered by the Caribbean Sea, Atlantic Ocean, & Pacific Ocean.
Borders: SA is connected to North America by the Isthmus of Panama, a thin land-bridge.
Languages: Thousands of languages are spoken in SA including Spanish, English, Portuguese, and Quechuan.
Religion: About 85% of the population identifies as Catholic.
Cultural passions: Samba dance, Guitar music, soccer, boxing, horseracing, telenovela shows (Spanish soap opera drama shows), bullfighting
Fun fact: One of South America's famous cultural and colorful celebrations was made into a movie (Rio I and Rio II) by Disney! The movie showed the beautiful bright costumes, festive music, and wonderful dancing local to Rio de Janiero.