The next morning they woke up and instantly went back to the cave they found the gem in, then they found the cave, "I forgot about that door." Rick said, "Okay, let's just try pushing it open." Melvin responded, so they both tried opening the cave until they opened the entrance.
"Now we could go in." Rick said, when they both went in they looked back at the carved out artwork, "The artwork seems to show the gem in a pyramid..." Melvin said, "And it seems to show a huge tsunami destroying the pyramid." Rick responded, "WAIT, I think that's how this Island was made, it used to be a big piece of land until a tsunami came and destroy it." Melvin said, "Wait, your right." Rick responded.
When they both find out that information they went to the middle of the forest to see if they still find the pyramid, when they we're looking for the pyramid they accidentally tripped on something. When they looked back they saw the roof part of a pyramid, "Jackpot!" Melvin said.
They both grabbed bamboo sticks and tried digging the hole so they could somehow get into the pyramid, "I'm seeing a window...." Rick said while they we're digging, "Me too." Melvin responded. When they we're done they saw the window and went through.