1 Nephi 8:31-32
31 And he also saw other multitudes feeling their way towards that great and spacious building.
32 And it came to pass that many were drowned in the depths of the fountain; and many were lost from his view, wandering in strange roads.
There are only two paths, but the second has many forks, and as many destinations as one might set his soul to discover. Some lead to the treacherous brink of the river of filthy water. They thirst and seek to drink from a river that is not the waters of life, and many were drowned in its depths. Later, Nephi explained:
26 And they said unto me: What meaneth the river of water which our father saw?
27 And I said unto them that the water which my father saw was filthiness; and so much was his mind swallowed up in other things that he beheld not the filthiness of the water.
28 And I said unto them that it was an awful gulf, which separated the wicked from the tree of life, and also from the saints of God.
29 And I said unto them that it was a representation of that awful hell, which the angel said unto me was prepared for the wicked (1 Nephi 15:26-29).