This is an interesting article about the use of definite articles used for some place names in several languages. If you're tired of thinking about the use of (grammatical) articles, come and join Kotobaax to study Japanese! Luckily, there is NO (grammatical) articles in Japanese.
'a chair' and 'the chair' (in English)
'une chaise' and 'la chaise' (in French)
'isu' (in Japanese)