Underground River and Lake

R
|
R     R   R
 \   / \ /
  R-R   R-R   R     R
         / \  |    /|
  R     R   R-R-R-R R
 /     /             \
R     R     R   R-R   R-R-R      T : Type dig down to Giant River Turtle
 \     \    |  /   \ /                            
  R     R R-R-R     T
   \   /   /
    R R   R                               R
     \   /                               /
      R-R                               R
      |                                /
      R                 R             R-R  
     /                 / \           /   \    
    R   R       R   R-R   R-R     R-R     R-R
   /   /       /   /   \ /   \   /   \       \
  R   R   R-R R R-R     R     R-R     R       R
   \ /   /   \|/              |       |        \
    R-R-R     R               R       R         R
                               \       \	|
                                R       R       R-R-R-R
                                               /
                                              R
                                             /
                                            M    M : Type Move Rocks
                                            |
                                          L-L-L
                                         / / \
                                    L-L-L L   L
                                   / \  | |  / \
                                  L   L L L L   L
                                   \ /   \ \ \ /
                                L-L-L     L L L
                               /   \      |  \ \  
                              L     L     L-L L L
                               \             \|  \
                                L             L   L   O-O
                                |                 |  /   \
                                L                 L-O     O
                               /|
                              L-L                   L-L   L
                              | |                   | |  / \ 
                              L L     L             L L-L   D
                             / / \   / \           /   \
                            L L   L-L   L-L-L     L     L  Down to Sandbar
                             \ \            |     |    /
                              L L-L         L     L   L
                                 /           \   /   /
                                L   L L   L   L-L   L-L   L
                                |   |  \ /           \   / \
                              L L L-L   L-L           L-L   L-L
                              |/ /   \ /                       \
                              L-L L L L                         L
                              |  / \| |
                              L-L   L L