As a fantasy and speculative fiction writer, I find worldbuilding fascinating. Below, you can find a series of posts all about worldbuilding, grouped in categories:
Setting & Geography
Creating a Fantasy World
Deciding on Your Fantasy Setting
What Planet Are You On?
Countries and Terrain
Cities
Inhabitants & Historical Context
Initial Character Ideas
Names
Systems in Society
Magic Systems
Religion
Currency
Political Systems
The Magic Behind Where Carpets Fly
Everyday Life & Culture
Career Choices in a Medieval Fantasy World
Genre Considerations
The Elements of Steampunk
The Elements of Dystopian Fiction
What is Young Adult Fantasy?