Sylvan Glade is the secret lot of Willow Creek that Sims can only access through the Sylvan tree in Foundry Cove, or in the Crick Cabana lot in The Sims 4. However, once the correct path through the tree is found, a new option to travel to Sylvan Glade appears, allowing Sims to bypass the choices.
For Sims who like to collect, Sylvan Glade offers some great opportunities. Sims can catch some rare frogs and fish in this area to add to their collections. There are lots of different plants and trees here as well that cannot be found elsewhere.