Search Flickr for all photos. What "tags" should be used?

I want to search ALL Flickr photo base on location, what "tags" should be used?

I tried with开发者_如何学Python NO "tag" specified, or "&tags=*", both return a seldom number of result! Any advise?

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If you have (or know how to get) latitude and longitude for your specific location, then have a look at photosForLocation and the API explorer for this functionality.