People travel from all over the world to see the thermal pools and breathtaking geysers at Yellowstone National Park . But as the posted signs and warnings tell everyone who visits that these landmarks are meant to be seen and not touched. A woman visiting the park on Sept. 16 learned that lesson the hard way. According to a news release from the National Park Service , a 60-year-old New Hampshire resident suffered second- and third-degree burns on her lower leg while walking in a th...