As one of the original castle left in Japan, you do feel something different in the air when you entered it. As someone who has a long interest in architecture, I can say that this is one of the most magnificent building that was ever made.
Himeji Castle is truly a work of art. Beautiful, elegant, and very white. The whole castle has English information, and a lot can be learnt here about Japanese history. You can stroll around inside numerous parts, and if you really wanted to, you could have an epic game of hide-and-seek in the castle grounds; they really are huge. I would definitely revisit Himeji Castle on my next trip to Hyogo Prefecture.