About Devils Tower: http://www.nps.gov/deto
About Religions of the World: http://www.bbc.co.uk/religion/religions
About the Sacred Sites in Jerusalem: http://news.bbc.co.uk/hi/english/static/in_depth/middle_east/2000/holy_places/default.stm
Christianity in European History: http://www.learner.org/resources/series58.html#program_descriptions
The Confucian Tradition: http://www.learner.org/resources/series144.html#program_descriptions
Sacred Sites in Jerusalem: http://www.learner.org/resources/series180.html#program_descriptions