It is worthwhile to look at how Appeal is calculated. Once Conservation is unlocked, you should start building Mounties, to establish National Parks, and Builders, to create Woods which increase tile Appeal and allow you to place National Parks in new locations. These Civics are on the same branch of the Civic tree.

Once all the important Medieval prerequisites are unlocked, you should go for Colonialism for Ice Hockey Rinks, then Conservation for Mounties. Even if you do have a strong Faith economy, you can use the thousands of Faith you will save to buy Rock Bands, boosting your late game Tourism on top of your National Parks. It is still a good idea to slot in Lightning Warfare (which is unlocked at Ideology) to aid with its Production, as the Mountie is a standalone unit that cannot be upgraded into. Meanwhile, a Mountie has 2 build charges and costs only 290 Production, which means every National Park established by a Mountie receives a better than 50% discount in cost compared to the Naturalist's National Parks. Every National Park established by the Naturalist costs 600 Faith, which is equivalent to 300 Production. After the huge cost reduction introduced in the April 2021 Update, the Mountie becomes the much more cost efficient version of the Naturalist, even without taking into consideration the fact that it can be built with Production instead of only purchasable with Faith, and does not go away after using all of its build charges. However, the Mountie is an incredible unit that allows Canada to establish many National Parks without needing a good Faith income. Compared to a standard Cavalry, it is available later and more expensive even then, whether or not it will do a good job on defense is not reliable until later, as your enemies can try to avoid attacking cities with National Parks. (The real life Mountie is a police unit, after all.) Remember to keep this fact in mind when prioritizing what promotions to give such units. This unit is not usable in conquest, only to defend.

Canada mounty