as with you chicken question - what do you mean by Pure honey? Do you mean Raw honey? I.e. not processed. Probably wet market is best place. But why do you want raw honey, just our of interest - as far as i understand no difference from your "usual" processed one - if anything, less bacteria.
Depends on the brand. The Lagnese stuff (German) is quite "pure" (and quite good). However as Idsllvn points out that doesn't mean "raw".
AFAIK honey is always "natural". If it was produced in a factory most countries would probably force the manufacturers to slap a big "artificial" on the name.