I found it at the station, where I changed my trains. When getting close to the round staff, I understood that it was made of wood. It seemed like that it was composed of lots of logs.The panel under this object said that it is a work that was created by a Korean artist and that came to first in a competition held several years ago.
I like it because the concept of this artwork is exceptional. Each peace appears to be connected with each other, but any nail was not seen on the surface.
I am really curious about the way to connect wood logs in a shape of sphere. For me, this object looks like a puzzle rather than an art.