+--maze +
\ | |
+ 2 ^ +--+--+--+
| | | | |
+--+--+--+--+--+ + +--+
| | | | o
+--+--+ + +--+--+--+ \
| | | | 3
+--+ +--+--+ +
| | / | |
+--+%-+ +--+--+--+
| / | | |
+ + +--+->maze +--+--+
/ | |
+ | 1 +--+
|/
+
1 = The Keep of Mahn-Tor {15-35}
2 = The Keep {65-100}
3 = The Keep (in cursed wood) {30-55}
Here is the universal key.