Mom says the diary talks about tunnels and passages that link up to other caverns and islands on Lake Titicaca some even branch into Bolivia. She only lets me study parts of the diary she’s copied into sections so I can focus on what she calls ‘basic training.’ She says she’s taking the parts to create a kind of a cou...rse to follow.’ ‘I hope that Dad will let me go exploring with Esteban when he gets back in a couple of months. He’s great to go with and I think he knows more about the cavern than anyone—except what’s in great-grandma’s diary. There are hand-drawn maps in it that show places Mom says they haven’t identified where they are yet. There’s just not anything they’ve seen that matches up to them. Of course they think only about 25% of the cavern has been explored so who knows what’s out there. There are places in the rift valley that look rocks or a landslide has sealed off part of it. There are walls and even some buildings that just stop at a pile of rock. Mom and Esteban plan to dig through or go over it to find out what’s on the other side but we just haven’t had time to do it yet. They’re concerned about it being dangerous—and I think Mom is kind of worried about what’s on the other side.’ --Sara Tsvetkov