Jason Momoa's muscles are a national treasure, which is why we love zeroing in on and celebrating them (by ogling them). This time, we're paying homage to Jason's back. The man has a nice-ass back, you guys. It's so chiseled and bulgy and always oily for some reason, but it works. It especially stands out when Jason is enjoying one of his favorite pastimes — wall climbing — which is not only impressive but very, very hot. Grab a towel and scroll through these scintillating snaps (and videos!) of Jason Momoa's back muscles.