Send that postcard from beneath the earth's surface: the Postojna cave in Slovenia houses a stand-alone structure that features a visitor center, galleries, biological treatment plant, and a post office.
In other news, Van Gogh's sunflowers get their mutation pinpointed, knock-off Series 7 chairs don't fair too well, and Ankasa opens a flagship store. Check out the headlines after the jump.
• Massive Slovenian Cave Plays Host to World's First Subterranean Post Office | Architizer
• Genetic mutation that made Vincent van Gogh's sunflowers unique has been mapped by scientists | Daily Mail
• Testing Strength on Knock Offs | Fritz Hansen
• Ankasa expands home accessories line, opens flagship store | The Editor at Large
(Image: via Architizer)