Places You Have To Visit Before They Disappear

The migration of the monarch butterflies (over 2,000 miles) is pretty amazing, especially when you consider how none of them has ever taken that path before. Each spring, they fly to the same area for nesting in the mountains of northeast Michoacán, Mexico. Their nesting grounds are in grave danger, which means the butterflies soon will be, too.


1. Michoacan Monarch Biosphere Reserve