Beginning next month, it will cost more to visit a Four-State historical site. Entrance fees to the Fort Scott National Historic Site are being increased. For visitors over the age of 17, fees will go up $1 to $3. Children 16 or under will still be allowed to enter for free. The entrance fees are used for maintenance, safety, resource protection and visitor service projects at the park. The fees have not increased since the 1980`s.