Wilson is currently considering whether areas like the Mourne Mountains should get the special conservation protection. He will travel to Cairngorms National Park, the UK's largest, tomorrow.
"Up until now the debate in Northern Ireland has focused on whether there should be a National Park in the Mournes - but there may be other areas that would be suitable," he said.
"Before that, however, we first need to think about what a National Park is and decide whether or not we want National Parks in Northern Ireland - and, if so, what they would be like.
"I am coming to this with an open mind. I want to learn from the experience elsewhere."