Himeji Castle
This castle is a World Heritage Site and a Japanese castle masterpiece. The main keep, built by Ikeda Terumasa in the early Edo period, has a five-story exterior, one basement level, and six stories above ground on the inside, making it the largest Edo period castle tower still standing.
Climbing to the top of the main keep is seriously exhausting, but the view is totally worth it! You can see all of Himeji City from up there!