I spin without a sound, yet my path is bound, with life I am crowned

I look like a mouth, but I am not a body part. People often dive here.

Immortals are the land, and those who inhabit it, but they won't grant eternal life, for our fate is a gift that will follow us even beyond the circles of the world.

I have ice, but I do not have fire. I am known for my inexorable movement .

I share my name with a good deal, but I am not free. People often travel the open seas with me.