As I mentioned before, Jack Kirby used splash pages quite often in Thor. Nearly every issue featured a great action shot or a titanic figure making a speech with Stan Lee's dialogue. Here are some great ones that were published during the last two years of Kirby's run on Thor.
Thor #161. My god has a hammer! And he loves to swing it.
Thor #159, Dr. Don Blake needs to find out the truth between his relationship with his godly alter-ego. How does he do it? By going to sleep and dreaming. I just recently read this one, never knew that they fully explained the Blake/Thor dichotomy.
Thor #162, Odin makes a speech that only Stan Lee could deliver, while dressed in a costume that would make Bob Mackie envious. Kirby didn't skimp on the details in a splash page.
Thor #170, the Recorder jets off into space after Thor and Galactus! Loved how Thor was a blend of mythic fantasy meeting characters in the science-fictional realms.
Incredible as all these pages were, Kirby was just warming up for his work on DC's New Gods series in the 1970s. I am currently re-reading those right now, they are still awesome decades later. Nuff Said!