Burası ilk kez karşılaştığımız unutulmaz yer.
- This is the unforgettable place where we met each other for the first time.
Yediğim en unutulmaz yemekti o.
- That was the most unforgettable meal that I've ever eaten.
... someone and there's that magical think about them that makes them unforgettable, it's that ...
... as for the scenery innocently unforgettable ...