1. I go to a museum to see pictures.

2. I go to a museum to watch pictures.
3. I go to a museum to look at pictures.
(Which one is commonly used?)

What do you normally say if you have pictures in front of you and you want someone to view them?

Would you say, come here to watch my pictures?

Come here to look at my pictures?

Come here to see my pictures?

I say 3. I go to a museum to look at pictures...

In this case, the most commonly used phrase is "I go to a museum to look at pictures." This sentence implies that you are visiting a museum in order to view or observe the pictures on display.

To determine which phrase is most commonly used, you can conduct a search on the internet or consult reliable sources like usage guides, dictionaries, or literature. Searching for similar expressions in books, articles, or reputable websites can provide insight into common usage and help you identify the most appropriate phrase to use in a given context.