Manuel Antonio is further the best place in Costa Rica to find sloths still hanging in their natural habitat - sloths paradise - BECAUSE during my nature hikes through the park I always spot from 2 to up 8 of them in just 2 hours hike including some good ones e.g hanging upside down or feeding on showing their faces up.
Also, we can even find sometimes females sloths with their babies carried in their front. Finally, it is important to mention that in Manuel Antonio Park is posible to find the two species which inhabit Costa Rica, those are the Two-toed Sloth and Brown-throated three toed Sloth.