Give some stream of consciousness and then the answer. Key West is located at 24 33 33" N 81 47 03" W / 24.55917 N 81.78417 W / 24.55917;-81.78417. The maximum elevation above sea level is about 18 feet (5 m), a 1-acre (4,000 m) area known as Solares Hill.

Based on this passage, what is the highest elevation of key west?
To answer this question, we should know that: The maximum elevation above sea level is about 18 feet (5 m), a 1-acre (4,000 m) area known as Solares Hill.
Therefore, the answer is about 18 feet ( 5 m ).