What religions of the world had europeans explored by late 1700

By the late 1700s, Europeans had explored a great deal of the world. In fact, it is probably more beneficial to mention the places they had not explored.

Antarctica/the Arctic
Jungles/Rainforests in Oceania, Africa, SE Asia, and South America
The highest peaks of large mountain ranges (Himalayas, Andes, etc.). 

So you know what happened and so it doesn’t repeat it’s self