In some areas of Japan, they cover their manholes with beautifully designed one-of-a-kind covers.
This isn't limited to one or two pieces, either.
The Asian trend is covered on a number of web sites. In fact, a search on Google images will result in all the manhole covers you can handle.
Also in this category:
Implications - The development of decorative pieces to be used in the streets during daily life is a way for certain areas to add a more attractive, upbeat element to their citizens' daily lives. This is seen everywhere from the painting of houses in Rio de Janeiro to covering manholes with art in Japan.
Manhole Covers as Art
More Stats +/-
Top 100 Tech Ideas in June
VR Music Systems
Galactic Rolling Pins
Natural Youthful Photography
Littered Cigarette Campaigns