The silver medal is under the right side of the bridge-like structure at 1516 AD (Leonardo's time).
Go to Leonardo da vinci's workshop (4 o'clock, 1516 AD) and go to the wooden frame at top right. When you jump up on the step with the ropes attached, the other step moves down. Jump over to that step, and it moves a small platform into the hole between the sides of the framework. Now you can jump down to that little platform, and jump hard to the right to reach the medal. It goes to Lewis and Clark (8 o'clock 1805 AD).
* You can reach the medal more easily if you first recover Da Vinci's notebook (jump to the ledge from the top left of the scaffolds at the Statue of Liberty, 10 o'clock, 1882 AD). Leonardo will give you his glider wings.
The peace medal on time tangled island is on Leonardo Davinci's part of the island when you climb to the top of the waterfall and walk over to this mechanism and you will see it hanging there.
It is a golden vase. (see the related question)
Once you have completed the quest on Time Tangled Island, return to the future machine and go 50 years into the future. You will notice that it is lovely and that you've successfully saved the future. Wander around and find yourself in 50 years, you will give yourself the medal.
go where artist find his notebook he will give you glides put em on and go where the guy is and and glide to the pecea medel
go back to the lab and fix the time machine and you will go to the furture and go to the highest building and you will get to a house and you will find you but older and that's where you will get your medal
you dont
inside a temple
@ the great wall...
The pumpkin head is in Time Tangled Island and you have to find it.
The cave is located in 0831 AD.
I don't think there is one.
In the Aztec period, you get them from the warrior.