Visiting the "Giant Sequoia" place you feel like being Gulliver in one of his travels. All the environment is so huge and unreal .. these guys are very big and it is difficult to realize it from the pictures since all the place is proportioned to such a size. Nonetheless, Nature is as huge as fragile: these trees have a lifetime that can reach 4000 years and survive in a very limited area in a small number. Some excesses of the past made them to decrease but now the park is applying stricter rules to take care of them. For instance, even walking too close around them has been discovered to be dangerous for their roots.