I have both Outdoor retreat and Jungle Adventure, but Jungle Adventure is primarily where I send my sims to vacation.
I'm not a fan of camping, not really a fan of hiking, and while the views are lovely, fishing isn't my thing either. So I find Outdoor retreat to be a bit ... dull. Because it's just a campground. A pretty campground, but just a campground.
Selvadorada/Jungle adventure on the other hand, has a culture your sim can actually learn, including new dance moves, museums with "history" and if you read the descriptions of the Omsican items in Jungle adventure, there's actually a fair amount of work that went in to developing that history and culture. And there's the jungle to explore with the temples and archeological excavations.
Admittedly, Selvadorada also plays to my personal interests, as I love learning about cultures and history, and the fine art of digging a six foot trench with a teaspoon and a paintbrush that is Archeology.
That and a high Archeology score can get you a decent income of simoleans on its own thanks to the museum sending you artifacts to identify.