The following are articles and excerpts from various National Geographic publications which may be of use to you:

http://news.nationalgeographic.com/news/2002/02/0220_020219_TVcircumcision.html (female circumcision)

http://java.nationalgeographic.com/studentatlas/clickup/zoroastrianism.html (Zoroastrianism, a religion of Persia)

http://magma.nationalgeographic.com/ngm/0408/getaways.html?fs=seabed.nationalgeographic.com (graduation)

http://news.nationalgeographic.com/news/2002/11/1113_021113_Skin.html (skin marking)

http://news.nationalgeographic.com/news/2002/11/1113_021113_Skin.html (mbuti rites of passage photos)

http://news.nationalgeographic.com/news/2002/11/1113_021113_Skin.html (Maasai of Kenya)

http://news.nationalgeographic.com/news/2002/11/1113_021113_Skin.html see second entry: Argentina and spiders)

http://news.nationalgeographic.com/news/2002/11/1113_021113_Skin.html (tattoos)

http://news.nationalgeographic.com/news/2002/10/1011_021011_taboo.html

http://news.nationalgeographic.com/news/2003/09/0912_030912_ancientgreece_2.html (Ancient Greece)

http://news.nationalgeographic.com/news/2003/09/0912_030912_ancientgreece_2.html (modern Western)