Visiting a state park in Indiana on June 4 or 5 will cost 10 cents per admission for each of the two days. This is being done because the Indiana State Parks are celebrating it’s 100th birthday by “rolling back” gate admissions. Ten cent per person is what park visitors paid in 1916. The special donation rate applies to all 24 parks and eight reservoir properties operated by Indiana State Parks. Visitors who have an annual pass or a Golden Hoosier Passport can still use those for admission. Additional fees for activities inside the park, such as off-road bicycling, horseback riding and camping, still apply at 2016 prices. At Falls of the Ohio State Park, the discount applies to the parking fee, but admission to the interpretive center will remain at current prices.