If you’re visiting the Great Wall via Beijing, it’s only about 2.5 hours drive to Mutianyu.
You can take the cable car up, and then ride the slide down if you feel like an adrenaline boost.
For best results, don’t apply the brake til the very end
… although it can be crowded, and you might not get a clean run behind someone slow.
It’s not far from Simitai where you can take the zipline down, so keen thrillseekers could even catch the cable car back up, and descend on the super-long flying fox.