What is the building with the purple roof with a gold v-shaped ****** and how do you expand to it. There is also something that looks like water attached to the side and a small building next to it. It is over to the left. It is in the direction where Thurston was sneezing. When I tap it, it does not tell what it is. It just says expand here to claim your reward. I have expanded all around it, but it won't let me expand there. Please tell me how to claim it. Thanks