The Crater-Toll Gate Area

1. What caused the Crater?
   
2. Is there any significance to the moss and lichens in the Slimy Room?
   
3. Can I cross the chasm to the west of the Crater?
   
4. How can I climb the zorkmid tree?
   
5. Can I pick the zorkmid coins from the zorkmid tree?
   
6. Is there any significance to the Hall of Carvings?
   
7. How can I make the invisible carvings appear?
   
8. Who built the underground highway?
   
9. How can I get past the Toll Gate?
   
10. What is the floor waxer used for?
    
11. Is there any significance to the Stone Hut?