Beautiful, moving, and conveys the feeling of an ancient snowy mountain perfectly. The FFX soundtrack in general was just incredible, but a lot of my other favorite tracks were action/battle themes.
Also, BGM is yet another field where The Legend of Zelda Ocarina of Time is immaculate:
Majora's Mask had great BGM too, so I'm sure the later games like Twilight Princess (didn't get far before my wii controller broke down & I never replaced it ) and Skyward Sword (never played) also slay in this regard.