Well I wasn't sure where to submit this but there are a few rewards I believe that Jagex don't tell you about.

 

 

 

#1. I found a rather nice reward after completing the new quest spirit of summer. After the quest head over to the forgotten cemetery and notice the caskets in the ruined building. They are locked on normal worlds but after the quest you should know what to do. There should be a reward inside these. (This reward is 10,000 Prayer Xp)

 

 

 

#2. Go to the Axe Hut in level 50 something wilderness there is another reward there while using the ring there. (This reward is 7,500 Attack Xp)

 

 

 

#3. If you operate ring on the portal next to that flower patch you grew limp on there is another reward too. (This reward is 10,000 Farming Xp)

User reposted in other forum. thanks!