(maze)---------+
(maze) | |
| | + +
v + / + |
+ | / ^\ +-<--+
+ / + v ^
| + | \ +
+ \ + \ ^
| \ | | |
/->-+ \ + | 1
/ | + | v River
| +----+ / +----+
| | / v |
| +--=-+----+----+----+
| /
\-<---/