Aragon
Baoding
fool4jesus
Leesburg
Definitely worth it. I don’t know how somebody could consider it boring. You really feel like you’re looking back over a thousand years. The only real negative is that the place is swarming with people selling junk (just like almost everywhere else around Beijing), but it’s still amazing to experience.
I am assuming you would go at the tourist spot near Beijing. There’s a tram to the top so you don’t have to walk.