This is a Chronological list of parody covers of the National Geographic Magazine. Scott Shier has an excellent discussion on this topic in the Ephemera & Collectibles group. I felt that since these covers reflect an outside perception of the magazine I would provide a visual listing over time of these covers here to maybe provide some insight into how others see us.
Note, I am not only including actual covers and pages simulating covers in this listing but also posters, refrigerator magnets, trading cards and electronic images.
March 1936 - Pick & Hammer Club - Cover
May 1958 - Mad Magazine - Page
January 1966 - National Press Club - Cover
1967 - Vol. 4, No. 1 Lithopinion - Multiple Pages
1968 - Richard Pryor - Album Cover
May 1972(?) - Rainier Beer - Poster
December 1972 - National Lampoon - Page
1975 - Cracked Magazine - Back Cover
December 1975 - Playboy Magazine - Page
1976 - Dr. Fegg's - Book Page
1980 - Topps Wacky Products - Trading Card
August 1981 - Miss Piggy Cover Girl Fantasy Calendar - Page
February 1982 - Darkroom Magazine - Page
May 1983 - National Lampoon - Page
April 1986 - What's On (Scotland) - Cover
October 1989 - House and Garden Magazine - Menu
1992 - Nude & Natural - Cover
1995 - Waterworld - Movie Props (5)
2004 - Safely on the Sun - Magnet
March 19, 2004 - Fruitfly Geographic - Cover
April 2008 - Harvard Lampoon - Cover
March 2009 - Vanity Fair - Partial Page
October 24, 2010 (?) - The Portland Mercury - Cover
March 2011 - Mediavengers - eCover
Spring 2012 - Metro Times Chronicle - Cover
December 2012 - Mediavengers - eCover
May 2013 - Mediavengers - eCover
June 2014 - Sarah Palin - Magnet
September 2015 - New York Times - Editorial Cartoon
September 2015 - HBO: Real Time - 8 eCovers
February 2016 - HBO: Real Time - eCover
April 2016 - Michigan J. Frog - Magnet
2019 - eljueveves (Spanish)
Note: I just added a parody cover from the April 1986 "What's On" magazine from Scotland.
Note: I just added 5 movie props - fake NGM covers from the 1995 movie "Waterworld".
Note: I just added the cover from an issue of El Jueves (The Thursday) a Spanish Satirical Magazine. Photo courtesy of Juan Carlos Herrera del Castillo.
Note: I just added a cover from the 2004 book of poetry by Stephen Brockwell.