"Interesting thing" in Engpsh can be referred to as "something interesting" or "something intriguing".
For example:
"I heard about a really interesting thing happening in the city this weekend."
"Have you heard of any interesting things happening at the office lately?"
In both of these examples, the word "interesting" is used to describe a specific event or occurrence that is worth paying attention to or noteworthy in some way. The word "thing" is a general term used to refer to an object or event.