What are some great business Instagram pages?

Almost every start-up and business has an Instagram page these days. Having one with a good number of followers can definitely increase credibility, but the question is: how do you make a page interesting/worthwile for your users?

Personally I'm quite sceptical about the value in these pages. Seeing a lot of big companies with 50K followers and only 50 likes per post, makes me think it's not easy creating an interesting page.

Do you have good examples of business/start-up/product Instagram pages that are actually worth following?