This is the 7682nd most frequent Japanese word.
南伊豆
"南伊豆" (Minami-Izu) refers to the southern region of the Izu Peninsula in Shizuoka Prefecture, Japan.
In this sentence, 南伊豆 is used as a proper noun to refer to a specific geographic location, indicating its characteristic as a tourist site.
南伊豆は美しい観光スポットです。
Minamiizu is a beautiful sightseeing spot.
Here, 南伊豆 is describing the area in relation to a feature, the clear sea, signifying the region's natural attributes.
南伊豆の海はとても澄んでいる。
The sea in Minamiizu is very clear.
南伊豆 is applied to specify the destination of an activity, emphasizing its locational role in the sentence.