Are places of interest idioms?

Places of interest are idioms.

places of historic interest and scenic beauty

Pinyin: míng shèng gǔ jī ψ

Commentary: Scenic spots with beautiful scenery and numerous historical sites.

Source: Lu Yao's "Ordinary World", Volume I, Chapter 45: "All the places of interest in Beijing have been there more than twice."

The places of interest in China are worth visiting.

Synonym: famous mountains and great rivers

Grammar: as an object; It refers to a famous place with beautiful scenery and many historical sites.