Alma 63:5

5 And it came to pass that Hagoth, he being an aexceedingly curious man, therefore he went forth and built him an exceedingly large ship, on the borders of the land bBountiful, by the land Desolation, and launched it forth into the west sea, by the cnarrow neck which led into the land northward.

Ether 10:20

20 And they built a great city by the anarrow neck of land, by the place where the sea divides the land.