Jump up at the right and go left. The Stone Bowl (from 8 o'clock, 1805 AD) goes to the guard at far left. To the right, get the Thor Amulet and the barrel of gunpowder (2 o'clock, 831 AD).
The great wall of China is located on the Time Tangled Island. Hope this helps.
The barrel of explosives on time tangled is on the left of the Great Wall of China.
Look under and find the treasure
The gunpowder is in China (1593 AD), by the wall to the right.
It is at 1593 AD on the time device (6 o'clock position).
The Great Wall of China is at 1593 AD, which is 6 o'clock on the time device. (see related question)
Go clock wise on the time watch and click on the 6th picture and that is the place where "The Great Wall Of China" is at.
To open the cave at 831 AD, get the gunpowder from the Great Wall of China.
To the far right in The Great Wall of China (1593 AD)
Go to the Great Wall of China. Head right and you will see a barrel of gunpowder.
There are som bridges. Jump on them and you will see the top of the wall. Enjoy , fellow Poptropicans!! :)
you go to the china brick wall and on the bottom right you will find the gun powder