Obsidian Tavern
Obsidian Tavern

Sci-Fi Writing Prompts: Geography Edition

A comprehensive Writing Prompts for Sci-Fi writers working on Geography. Free worldbuilding resource from Obsidian Tavern.

Geography in science fiction extends far beyond mapping alien worlds—it's about understanding how physical environments shape societies, conflicts, and human adaptation across space and time. These prompts challenge you to think systematically about how geological processes, atmospheric conditions, and spatial relationships drive narrative tension in ways unique to speculative fiction.

1

Design a planet where the geography actively changes based on the collective emotional state of its inhabitants, with mountain ranges rising during periods of social anxiety and valleys deepening during collective grief.

Your story follows a terraforming psychologist who must stabilize both the planet's geography and its colonists' mental health before seismic emotional feedback loops destroy the settlement.

Genre twist: The planet's responsiveness isn't magical—it's due to a symbiotic nanobiome in the soil that evolved to respond to biochemical stress markers, creating a measurable feedback loop between psychology and tectonics.
2

Create a tidally locked planet where the habitable twilight zone is only 50 kilometers wide, forcing all civilization into a single, planet-spanning city that must constantly migrate to stay within the optimal temperature band.

Climate shifts have begun moving the habitable zone faster than the city can relocate, and your protagonist must choose between sections of the population to save as the city fragments.

Genre twist: The acceleration isn't natural climate change—it's caused by industrial heat from the city itself, creating a tragic irony where civilization's growth makes it uninhabitable.
3

Develop a water world where the only 'land' consists of massive, slow-moving sea creatures that different cultures have built cities upon, creating mobile island-nations with their own ecosystems.

When several of these creature-islands begin diving deeper than ever before, stranding surface cities underwater, your characters must discover whether this is natural migration, disease, or something more sinister.

Genre twist: The creatures are actually living spacecraft from an ancient civilization, and they're responding to a long-dormant recall signal from deep space, forcing inhabitants to choose between their homes and their lives.
4

Build a world inside a massive ring habitat where 'weather' is controlled by rotating sections with different atmospheric conditions, and geography consists of adjustable modules that can be reconfigured like city blocks.

A terrorist group has gained control of the geographic configuration systems and is reshaping the habitat to trap specific populations in uninhabitable climate zones.

Genre twist: The habitat's modular geography was originally designed as a massive 3D printer for terraforming equipment—your characters must activate this function to literally manufacture their escape route.
5

Design a planet where gravity varies dramatically across regions due to dense metallic deposits underground, creating areas where humans can fly naturally alongside regions where they can barely crawl.

Your story centers on a courier who must transport critical medical supplies across multiple gravity zones where vehicles can't function, using only their knowledge of gravitational geography.

Genre twist: The metallic deposits are actually fragments of a massive alien megastructure that crashed eons ago, and reassembling the gravitational map reveals blueprints for technology that could revolutionize space travel.

How to Use These Prompts

Start each prompt by sketching the physics behind your geography—even fantastical elements need consistent rules. Focus on how your characters' daily lives, transportation, communication, and social structures must adapt to these geographic realities. Remember that in sci-fi, geography often reflects themes about technology's relationship with nature, so consider what your landscape says about human advancement, adaptation, or hubris.

The best science fiction geography doesn't just provide an exotic backdrop—it becomes an active participant in your story's conflict and theme. Let your landscapes challenge both your characters and your readers' assumptions about how worlds work.