Spencer and Emily first come here in "Keep Your Friends Close" after "A" send them on a scavenger hunt during Mona's glamping party. Once there, they find a beaded bracelet with Jenna's name on it, and a tree with the words "Alison + Ian" surrounded by a heart, carved into the trunk.
In "Picture This," Caleb takes a detour here after picking up pizza instead of returning to Hanna's home right away. He is on a swing when Hanna finds him and joins him. He is quite thoughtful about his changing family situation.