In what places is prostitution completely legal?

Depends on what you mean by legal. Prostitution itself as a so called industry is legal in Nevada only. Prostitution today is considered a victim crime because women are more often forced through drug addiction or sex slavery into prostitution. State Attorney's today are lenient and states have programs that protect women and wean them away from prosecution of prostitution. Some research on Calif and other state laws will show you the reform.

There is NO location, not even Vegas, where prostitution is COMPLETELY legal. There are ALWASY restriction.

For example, the famous Nevada Chicken Ranches ("We raised 30,000 coks last year"), a prostitute can work ONLY in the house they are licensed for, and NOT in another house, a casino, or on the street. Street Prostitution is COMPLETELY illegal, even in Nevada..

Place like Thailand and MyinMar have looser laws, but the incidence of STD like Syphilis and AIDS are EXTREMELY high

Just out of personal knowledge, it's legal in the UK but everything around it isn't, including advertising it, pimping, "living off immoral earnings" as a pimp, and soliciting in public. So it's fine as long as a prostitute works by themselves and meets clients only by private arrangement. The result is a lot of adverts in local papers for massage or "escorting".

It certainly is in the Netherlands, as you can easily see from a wander round the Amsterdam red light district at night.

move to the uk its legal here but its illegal to kerb crawl, keep a disorderly house eg a brothel its also against the law to solicit in the street or anywhere in public

It is legal in all of Nevada except Clark County (where Las Vegas is located).

do a search on google or yahoo and something might pop up

idk about navada put in spain its legal