Interior architecture student Birgit Oigus poses for a picture in the wooden megaphone in the forest near Pahni village, Estonia, September 28, 2015. If you go down to the woods in Estonia today, you're sure of a big surprise: three large-scale wooden megaphones have been set up by architecture students for visitors to climb inside. Professors at the Estonian Academy of Arts' architecture department sent students into the forest to find inspiration to create a forest library. But student Birgit Oigus, realising that preserving books outdoors in the Estonian autumn and winter would be nigh-on impossible, decided to think outside the box. (Photo by Ints Kalnins/Reuters)





Head of the department of the interior architecture at Estonian Academy of Arts Hannes Praks (R) and student Birgit Oigus pose for a picture in the wooden megaphone in the forest near Pahni village, Estonia, September 28, 2015. (Photo by Ints Kalnins/Reuters)





Interior architecture student Birgit Oigus poses for a picture in the wooden megaphone in the forest near Pahni village, Estonia, September 28, 2015. (Photo by Ints Kalnins/Reuters)





People gather near the wooden megaphones in the forest near Pahni village, Estonia, September 28, 2015. (Photo by Ints Kalnins/Reuters)





People gather near the wooden megaphones in the forest near Pahni village, Estonia, September 28, 2015. (Photo by Ints Kalnins/Reuters)





People gather near the wooden megaphones in the forest near Pahni village, Estonia, September 28, 2015. (Photo by Ints Kalnins/Reuters)





Children play in the wooden megaphone in the forest near Pahni village, Estonia, September 28, 2015. (Photo by Ints Kalnins/Reuters)





People gather near the wooden megaphones in the forest near Pahni village, Estonia, September 28, 2015. (Photo by Ints Kalnins/Reuters)





Head of the department of the interior architecture at Estonian Academy of Arts Hannes Praks poses for a picture in the wooden megaphone in the forest near Pahni village, Estonia, September 28, 2015. (Photo by Ints Kalnins/Reuters)





People gather near the wooden megaphone in the forest near Pahni village, Estonia, September 28, 2015. (Photo by Ints Kalnins/Reuters)