(Olympus C3000Z; 1/100 sec.; F 2.8; 100 ISO)
Photo of a giant sculpture of a trefoil knot located at the lobby of the Science and Technology Museum in Beijing, China. This sculpture has the shape of a trefoil knot of trianglar base. Its boundary is illuminated with animated lights, so that they show the surface is a Möbius band.
This is my second entry for the photography contest B & W Photo Contest -- Geometric shapes ran by @daveks.
My first entry in this contest can be seen in this link,