noun, する verb
If you try to see a bunch of things at once, you are probably sightseeing or watching. This can also refer to the person doing the action, so it can sometimes mean sightseer too.
The reading is all on'yomi, and you know how to read 物. 見's on'yomi (けん) is a reading you didn't learn with the kanji because it's so much less useful, but you do have to know it here. You've seen it with 発見 a couple levels ago, so that should help. Just imagine taking the samurai Ken on an epic sightseeing trip. Think of all the things you and Ken will visit!
It seems fun, so let’s have a look.
We watched the Christmas parade from the office windows.
Mom would have gone sightseeing in Tokyo.