The CIA World Factbook contains data on Roman Catholic population percentages across the globe, as well as information about Vatican City.

The North American Federation of (Reform) Temple Youth sponsors a summer youth program, NFTY in Israel, and the Eisendrath High School exchange program.

Read an Aug. 7, 2002, United Methodist News Service article on the Foundation for Religious Freedom’s website about an interfaith summer camp gathering at a United Methodist Camp in North Carolina.

Read a March 3, 2011, Gazette article about how the U.S. Army Corps of Engineers leased land in Iowa so Muslim Youth Camps of America could build a summer camp and the efforts to build the camp after the lease expired.

Read a June 4, 2003, article on the Fox News website on the controversy over a Muslim youth camp in Iowa.

Read the transcript of a March 9, 2001, Religion & Ethics Newsweekly program on Celtic spirituality, which discusses the Celts’ sense of nature as “the theatre of divine presence.”

Read a Beliefnet.com article by Kimberly Winston about the rapid growth of Wicca and other Earth-based religions.

The Witches’ Voice lists outdoor rituals and festivals around the country, including a state-by-state section.