Cloud Castles

[Cloud Castles] are objects that can be received by clearing Bonus Mission Islands. Starting at level 4, Cloud Castles can be harvested for Blobs of Water (Floating Stones) and sometimes Elegant Satchels which are unlocked by pearls. Glowing Cloud Castles can be tapped for Blobs of Water. Cloud Castles can only be harvested occasionally on an invisible timer. Level 5 castles have a timer of 2.5 minutes.

Object Information
There are currently 12 different levels of [Cloud Castles], with level 12 being a [Wonder]: