In the 1970s, the publisher introduced a spin-off series: the "Sonderhefte" (Special Issues). Initially, these special editions focused on thematic travelogues, covering holiday destinations popular with naturists, such as "Korsika" (Corsica) or "Frankreichs Küsten" (the coasts of France). These issues were likely similar in tone to the main magazine, serving as a pictorial guide to naturist-friendly locations across Europe.
: Highlighting isolated beaches, hidden lake districts, and private campgrounds where individuals could safely practice FKK. Sonnenfreunde Sonderheft Nudist Magazine -2021-