How do you get out of the collapsing building in endless ocean blue world

If your talking about Cavern of the Gods, first, go to the way you came in. Stupid! The way you can't always be the way out! Still, you have to do it. A current! Go to the other pillars near that 1st door you figured out about the Magnetic Ore. Click the door. Find...Set... Huh???!!! Where is Set?! Set is one of the descendants of the sun god Ra, so Set is around the door, probably. Find a shiny, sparkly thing in the wall. Yay! you're done! Cavern of the Gods is now closed tight...(No dolphin, no TNT, just save a million dollars, okay?)