Just see what they can do for you. Pit Viper facts. ; Its tendency to lurk near human habitations and temperament are the main reasons why this snake is easily considered one of the most dangerous of its species in the world Pit vipers: In the Old World from eastern Europe eastward through Asia to Japan, Taiwan, ... (including the article images and facts) can be freely used under Attribution-ShareAlike license, unless stated otherwise. These highly venomous pit vipers can often be found in near rivers and streams lowland habitats , usually near human habitations , well camouflaged in leaf litter . The Optimal Blend of Style & Performance. Kids Encyclopedia Facts. Pit Viper Sunglasses. Made for a rugged and outgoing lifestyle. Viper facts for kids.