Instructions: You are given a sentence in Japanese. Your job is to translate the Japanese sentence into English.
Input: ここは地球上に残された全く未知の世界です
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
This is where the last little nugget of totally unknown territory remains on this planet.