There are thousands of tribes that come with diverse traditions and customs. And many of these tribes we don't even know of exist. Funny enough, some of us might have had close encounters with any of these non-aggressive tribes, and I promise you, they're pretty fascinating if you get to know more about their customs and traditions and, most importantly, how they came about.

From the extremely secluded Sentinelese tribe to the smallest settlements’ unknown to many, here are "20 scariest Tribes you don't want to meet."