I was told that you could walk to Seokguram from Bulguksa. Just a 50 minute walk. Or take a shuttle that comes every hour, which isn’t as quickly. What I wasn’t told was that the walk was a hike up a mountain for an hour. Nevertheless, once I started, there was no other way to go but up. Seeing the Sakyamuni Buddha inside the grotto was amazing. My only regret was that photos were not allowed.