The Whirlpool is a special ocean area in the First Sea that serves as the main entrance to Underwater City. Its primary purpose is transportation, as players must pass through it to access the underwater region.

The Whirlpool is located in the open ocean near Frozen Village. Because of its connection to Underwater City, it acts as an important landmark for players progressing through the First Sea.

Visually, the area features a large swirling whirlpool surrounded by rock formations with small patches of grass. A boat dock is also present nearby, reinforcing its role as a travel point for players approaching by sea.