Unutulmaz bir tatildi.
- It was an unforgettable vacation.
Burası ilk kez karşılaştığımız unutulmaz yer.
- This is the unforgettable place where we met each other for the first time.
... someone and there's that magical think about them that makes them unforgettable, it's that ...
... as for the scenery innocently unforgettable ...