The sentence ending ~네요 is used to indicate your emotional reaction to what you have just realized. Often it expresses your surprise typically at an unexpected or counter-expected events or states.

-네요 is a bit like "I just found that ...", with some feeling of surprise.

Like, if I just learned something new, instead of telling you what I already knew before.

In the Japanese section on here that's translated with question tags like: Busan Station is small, isn't it!