Sometimes makes me crazy. Too many exceptions, too many "it depends".
Let’s see how inconsistent the articles rules are. Reference: Exploring Grammar in Context

• The Amazon but Lake Placid
• Mount Everest but the Himalayas
• Taiwan but the Netherlands
• 75 Trent Road but the M56 (route)
• The Guardian but Time magazine
• I prefer radio to television. But Turn on the radio and the TV.
• I play golf. But I play the piano.
• I go to school. But I go to the church.
• The United Kingdom but northern England

These are only the beginnings. I think an entire semester in a university could be spent on article usage (and plurals). It is a long way to go. Sigh.