Hyrule Castle town is a major center of wealth and commerce for thousands of miles around. Many people know of it's great opportunities and rumored safety. Right now, castle town is full to bursting with refugee's needing the sanctuary of its magic barriers.
Many of it's inhabitants are ignorant of the darkness everywhere else, and life moves on where it has become a struggle elsewhere. That's not to say
everyone is in castle town. Many think of the new events of the world as just 'hard times' and continue their lives rather passably in the rest of the world. But many, especially those who have experienced firsthand what is happening in the temples around the world, see Hyrule as their only hope of escaping destruction.
Hyrule Castle is surrounded by a moat, with drawbridge's all around that only lower during the day. There is a bridge on the East, West, and South portions of the city. The Northen moat has no drawbridge, and leads to the Terminus fields and forests, which eventually turn into the Terminus sewers. Further information may be received upon further exploration.
On all other sides of the moat, are the Hyrule fields, which lead to Death Mountain in the East, Zora River in the South East, Kokiri Forest in the South, Lake Hylia in the South West, Zora's Domain in the West, and Gerudo Valley in the North West. Further information about these locations may also be available upon exploration.