James Fox (Sleepy)
Google
It's absolutely worth coming here! It's full of tourists, but for the good reason that the natural sights are incredible. I did this without a guide, and so i missed out on the story, but you can certainly book guides ahead of time.
Even without one, though, you can appreciate the architecture and design, as well as appreciate the beautiful landscape.
WARNING! This place is very very hot and also requires you to be able to climb many stairs! It's the same as if it was a major hike. Bring pocari sweat and water!