hidden gem

Something possessing a value or beauty that is not immediately apparent, which therefore has received far less recognition than it deserves. / (video games) A hidden item for a player to find.

Japanese Meaning

目立たない場所に存在しながら、本来持つべき評価や価値、美しさを秘めた逸品・宝石（隠れた名作・逸品） / （ビデオゲーム用語として）プレイヤーが探し出すために隠されているアイテム

What is this buttons?

The little coastal town turned out to be a hidden gem, with quiet beaches and family-run seafood restaurants.

Google Translation / DeepL Translation

その小さな海沿いの町は、静かなビーチや家族経営のシーフードレストランが並ぶ知る人ぞ知る名所だった。

Details

Sense（1）

Ordinary readers would have passed it by unnoticed, but his keen eye saw the hidden gem, and he quickly seized it, and held it up to his delighted hearers.

Google Translation / DeepL Translation