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