In 
Norway and Sweden there are several places called Å, in France it is Y, in Japan 
O. Some time ago a 6 existed in West Virginia, USA.
 
The 
longest according to Guinnes, consisting of one word is (85 
letters):
Taumatawhakatangihangakoauauotamateaturipukakapikimaungahoronukupokaiwhenuakitanatahu 
which is located at Southern Hawke's Bay, New Zealand.
 
But 
the official name of Thailand's capital Bangkok is consisting of 12 words and 
167 letters.
 
Jan