What place could this be?
It is a sea.
    src        edge_attr  dst
0     3  to the right of    9
1     3   to the left of    4
2     4  to the right of   13
3     4  to the right of   11
4     4  to the right of    9
5     4  to the right of    3
6     7               of   13
7     9   to the left of    4
8     9   to the left of    3
9     9   to the left of   13
10    9   to the left of   11
11   10               by   13
12   11  to the right of    9
13   11   to the left of    4
14   12               in    8
15   13  to the right of    9
16   13   to the left of    4