"beautiful" is such a vague term. but i kind of like that this thread was created this way, because it's going to, and already has, consolidated a wide array of choices. here are a few of mine:
this one is self-explanatory. no words needed from me:
this one may be a strange choice, but give it a chance. it reminds me of childhood and enchanted forests:
and i chose this one because it has the most beautiful guitar lead into an album i've ever heard. and also because it continues all throughout the song. i love it: