Certain numismatic items combine currency with commemorations of natural landmarks. These collectibles often involve a specific denomination of United States currency that has been enhanced to feature imagery or branding related to protected environmental areas. As an example, a two-dollar bill might be augmented with a stamp, sticker, or other marking that highlights a particular natural reserve.
These modified banknotes can serve as both souvenirs and educational tools, raising awareness about conservation efforts and promoting tourism to these protected sites. Historically, such initiatives have been used to generate revenue for park upkeep and improvements, with a portion of the sale of these items often earmarked for park-related projects. This allows individuals to own a tangible piece of their visit while contributing to the preservation of these treasured spaces.