Where Am I?

CLUES

1. This needle-shaped volcanic plug stands 386 meters tall.
2. Mosses, frequent fog and rain make climbing this peak dangerous, yet some still attempt the slippery ascent each year.
3. The area around the peak is known for exotic wildlife, including an abundance of snakes.
4. This formation has been called “The Dark Tower.” 

ANSWER  Pico Cão Grande volcanic formation in São Tomé and Príncipe