I found artistic manhole covers walking around JR Shizuoka station. In Japan most local municipalities have their own manhole covers featuring the local specialties and attractions. In the case of Shizuoka it is Mt. Fuji.
Those covers are colored with natural resin. The resin will last about 20 years.
Here features an Australian artist Remo Camerota’s best-selling photo book about Japan’s artistic manhole covers: http://www.flickr.com/photos/remocamerota/sets/72157618891378190/
When you see upward, you would see many electric wires here. They can look ugly, unfortunately. Please try looking downward then. You might see interesting works of manhole art.
★★★ If you notice those manhole covers, you would like them!