Which job can let me to travel all the forests in the world??

Indian Forest Services offers jobs in various fields ranging from analytics to on-site work. You will get to travel across different forests and habitats of India depending upon the region. Your region can also be transferred. But, if you are talking about traveling through all the forests in the world, then you can approach Global Forest Preservation NGOs throughout the world. They will appoint you as forest officers across different continents. United Nations Environment Council also has posts available for forest researchers.

Best of Luck.