Have you ever heard of Sigur Ros? I was turned on to them a few years ago by a friend and I just love their sound. They are from Iceland and wikipedia describes them as "an Icelandic post-rock band with melodic, classical, and minimalistelements. The band is known for its ethereal sound and lead singer Jónsi Birgisson's falsetto voice".
I've included my favorite album in this post, it's called () and was released in 2002. The album is so relaxing and the reason this album is unique is because the lyrics are all nonsense. "Upon release all tracks on the album were untitled, though the band later published song names on their website. All of the lyrics on ( ) are sung in Vonlenska, also known as Hopelandic, a constructed language of nonsense syllables which resembles the phonology of the Icelandic language. It has also been said that the listener is supposed to interpret their own meanings of the lyrics which can then be written in the blank pages in the album booklet."
Seriously check them out, you'll love them!