They draw more than 85 million visitors a year, the most of any state park system.
It was expected to draw 125,000 visitors its first year.
It has drawn 1.5 million visitors a year on average.
Already it has drawn 1.8 million visitors, according to the company.
At that time the area drew 25,000 visitors each year.
The site draws more than 3.8 million visitors a month.
The park draws 20,000 visitors a day in the summer.
The center now draws more than 100,000 visitors a year.
The museum opened in 1996 and drew 250,000 visitors its first year.
The store draws more than two million visitors a year.