Treetop Walk in Lake Manyara National Park. You can do the well-known Canopy or Treetop Walk in Lake Manyara National Park. It goes over stable, narrow bridges along the trees and is more than 370 meters long. It is 15 meters high and goes through the beautiful, untouched nature of the national park, home to monkeys, butterflies, and many exotic birds. It might take longer than half an hour to walk, but only if you stop often to enjoy the view. See nature from a whole new angle!