This photosphere was taken while standing on a wooden bridge near the village Bad Hindelang (Bavaria, Germany). It was built about 15 years ago, but the design is a historic pattern. See another panorama (rectilinear) from this bridge on the blog of the Panotwins.
The shooting was done with a monopod. The lens was mounted with a custom-made bracket. Stitched from five images taken with a Walimex (Samyang) 7.5mm fish eye lens on a Sony ILCE-QX1. Four images around and an additional image for the floor.