Often the yorishiro is a large, old tree (shinboku) or a large rock (iwakura). The most spectacular iwakura in Japan is the pair of rocks from Meoto Iwa, the famous "wedded rocks", tied together by an impressive shimenawa weighting one tonne, one of the heaviest in Japan.
EXIF info:
Nikon D90
Lens: 18-70mm F/3.5-4.5G
Focal Length: 25mm
Aperture: F/5.6
Shutter Speed: 1/640s
ISO Sensitivity: ISO 200