Photographed here is one of the latter kind, a dobashi "earthen bridge". Made of mostly raw wood logs, this bridge in Rikugi-en, Bunkyo, Tokyo, is covered with soil planted with moss and grass.
EXIF info:
Nikon Df
Lens: VR 28-300mm F/3.5-5.6G
Focal Length: 68mm
Aperture: F/6.3
Shutter Speed: 1/2000s
ISO Sensitivity: ISO 500