When to use definite and indefinite articles
This seems to be one of those tricky subjects where things aren't always the same in Spanish as they are in English - this reference article looks to be quite helpful.

2 Answers
I especially appreciated the information about a geographic name, when modified by an adjective, needs the article. Muchas gracias por el información!
Yes it is confusing. Thanks for Article
BTW I like that picture ![]()