Ransom for his sister

Please help me save my sister! She is experienced archaeologist and she is kidnapped now. They are asking for her last finding- an ancient amulet. My sister found it, but of fear that it will fall into the wrong hands amulet was hidden in various places around the world.
What is this amulet and where to find it? We must hurry, time is short! It's time to start looking and hit the road!
#puzzle