The phrase "an unforgettable memory" is grammatically correct and can be used in written English.
It is typically used to describe a significant or impactful memory that remains in one's mind. Example: "The day my son was born is an unforgettable memory that will stay with me forever."
The arboretum provides an unforgettable memory for them".
Watching that news unfold with them became an unforgettable memory.
Lifted the spirits against Spain and Brazil, left an unforgettable memory against Italy.
What reads like a sufficiently pleasant day in each other's company becomes, for them, an unforgettable memory and an ineluctable call to be together.
The sight and sound of the incomparable Dorothy Loudon belting out "Sur les Quais de Ramsdale, Vermont" made an unforgettable memory for me.
"I've never given an entire show in New York City but I have an unforgettable memory," he said in a statement, adding, "in 1962, when I sang on the celebrated ship, the France, docked at the New York Harbor, for a charity concert in the presence of Jacqueline Kennedy".
For each guest Anne made the beauty and vitality of Contramundo a unique and unforgettable memory.
In honor of Cher's 70th birthday on May 20, take a walk down this unforgettable memory mane of looks.
To honor the Emerson experiences and sentiments that had long been ignored, the Y.M.C.A. here commissioned a filmmaker, Susan Hope Engel, to produce a documentary, "Unforgettable: Memories of the Emerson Street Branch Y.M.C.A".
That sounds disgusting, but was shockingly delicious and has given me an unforgettable taste memory.
I just completed a safari in Northern Tanzania and met couples on their honeymoon, families exploring scenes only accessible previously on the Discovery Channel and friends on a mission to create unforgettable memories together.
