Translation of "Unforgettable" in Chinese

An unforgettable event occurred.

一场令人难忘的事件发生了。

It really is unforgettable for me! Thank you!

真的令我難忘! 謝謝你!

This is the unforgettable place where we met each other for the first time.

这是我们第一次见面令人难忘的地方。