+> cave
+
+I don't know where the cave is, but hereabouts no stream can run on
+the surface for long. I would try the stream.
+
+You're in front of building.
+
+> listen
+
+The stream is gurgling placidly.
+
+> forward
+
+I am unsure how you are facing. Use compass points or nearby objects.
+
+You're in front of building.
+