We list to get all paid-admission parks in English-speaking countries that attract more than two million annual visitors. For parks between one and two million anual visitors, I'll add them if someone asks nicely and volunteers to input and maintain the listings. We're not listing parks with less than one million annual visitors. But we always welcome trip reports about any themed attractions anywhere, regardless of attendance.
If anyone encounters any problems with attraction input, lemme know. To delete a closed attraction, just click to its listing page, then click the "update this listing" link. There, you can click an option to alert me that the location is closed.