In order to visit turkey as a tourist, a visitor should apply and get a Turkey tourist visa. 90 days is the maximum validity of a visa one would get with a Turkey Tourist Visa. However, it always depends on the nationality of the visitor when it comes to tourist visa validity.
During my recent visit to turkey, I got a chance to travel to a famous place called Istanbul and also other interesting places in northern Turkey for a month. The Turkish land is loaded with lots of surprises, the locals there are incredibly kind (towards foreigners visiting Turkey) and especially the culture in turkey is totally different from the places which I have visited all around the world.