I stand corrected. I was thinking about the large waterparks, like Schlitterbahn in New Braunfels, but even it doesn't measure up in size. Here's the applicable definition:
Originally Posted by Freedom Doc
"Amusement park" means a permanent indoor or outdoor facility or park where amusement rides are available for use by the public that is located in a county with a population of more than one million, encompasses at least 75 acres in surface area, is enclosed with access only through controlled entries, is open for operation more than 120 days in each calendar year, and has security guards on the premises at all times. The term does not include any public or private driveway, street, sidewalk.
That's why forums like this are so valuable - they keep us on our toes! Thanks, Freedom Doc.