What sends shivers down your spine when you play it on your system?

And if I haven't lowered the tone enough, try this (although with over 7 billion views there's a good chance you already have ;-)My partner tells me it's nothing more than sex-on-a-stick, but if that's not going to provoke shivers........what is?
https://www.youtube.com/watch?v=kJQP7kiw5Fk&list=FLDZswku4mKJJBxF_GDrFs8g&index=101

Malia and Boris Blank collaboration on the album “Convergence”. One of my reference albums to test sound.. many songs that would fit the bill. Celestial Echo for example.. 

Tubular Bells - Mike Oldfield! 

Allman Brothers. On Blue Sky the guitar work between Duane and Dickie is unsurpassed. 

Take Five - Dave Brubeck
You and Your Friend - Dire Straits
What it's like - Everclear
A Thousand Kisses Deep - Leonard Cohen
Ode to the Glimmer Twin (acoustic live) - Nils Lofgren
Bolero - Ravel
Sleeping Sun - Nightwish
Nutcracker suite - Tchaikovsky 

It has been great visiting or revisiting the wonderful music suggested by everyone above. I love these kinds of threads. It almost always leads to the discovery of a musical treasure.

Mark