The piano intro is everything. It's so delicate and haunting and tantalizing. I can't wait to learn to play it.
The song itself - particularly the vocal melody - sounds like a sea shanty to me, like if KT Tunstall's "Shanty of the Whale" had an instrumental.
And the entire last minute sounds like an Enya interlude. Such a rich sound, with the wandering piano line and the soft humming and everything.
Altogether a really beautiful, peaceful, fascinating song.