After praying with the multitude "that the Holy Ghost should be given unto them [meaning those Jesus had chosen]" (3 Nephi 19:9), the twelve "went down unto the water's edge, and the multitude followed them" (3 Nephi 19:10-11). There they were baptized and filled with the Holy Ghost and with fire.
Geographically speaking, one might conclude that if the "water's edge" was immediately adjacent to where the multitude heard the Savior at the temple in the land of Bountiful, then water may have been a feature of the landscape (maybe a river, considering the near coastal setting of the land of Bountiful).