This is near Iymrith’s Lair, which is where the final battle of Storm King’s Thunder takes place. After that module, Iymrith and possibly her two offspring will no doubt be killed by the party. But there can be another use for this location.

Micro-Worldbuilding Opportunities: The magic that would allow the stone ships to float on water, and possibly create boats the float on air, may still be buried in a tomb near the place. Maybe kept hidden in Iymrith’s lair, right under her eyes. A dwarven party might want to find this.