The “post office cave”; Postojna, Slovenia  ©architizer.com
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Long used for underground concerts over the years, a cave in Slovenia has now been fashioned into a post office.
Postojna has been visited by humans since the 17th century, and as of this year was developed into the first-ever post office within a cave.
Materials for the structure were transported into the space via a “cave train,” and assembled inside the cavern by hand. In addition to the post office, the pavilion also features the first underground biological treatment plant in Slovenia.
Find out more about where to mail your next postcard in Slovenia here.