Civ 6 Wonder Placement Guide

Biosphère

Required neighbors are shown on the map — the remaining tiles can be anything.

Placement requirements

Must be adjacent to a river
Must be adjacent to: Neighborhood

Unlock & cost

Technology: Synthetic Materials
Production cost: 1740

Wonders that compete for the same tiles

From the placement data: these wonders share a placement requirement with Biosphère. A city meant to hold both needs a separate qualifying tile for each.

Big Ben — both need a river
Hanging Gardens — both need a river
Hermitage — both need a river
Országház — both need a river
Ruhr Valley — both need a river
Taj Mahal — both need a river

Is it worth building?

Power from renewables and yields that scale with your green grid. In a Gathering Storm endgame it can power an entire empire cleanly — best for science civs juggling power demands against climate damage.

Placement & timing tips

Needs a river tile adjacent to a Neighborhood — so it lives in a core city, and the Neighborhood has to be planned before the wonder. Keep your empire's rainforest and marsh standing, and build wind and solar first so the wonder lands on an already-green grid.

When to build it — and when not to

Build it when: Build when the endgame still has a real stretch of turns left and your cities are begging for power — especially if rising sea levels already punish you for burning coal and oil.
Skip it when: Skip if victory lands before power shortages bite, or if your grid still runs on fossil plants with no renewables placed — spaceport projects or the final culture push spend those hammers better.

Which city should build it

The placement rule is a river tile touching a Neighborhood, which already narrows the field to large late-game cities that needed housing badly enough to build one. The real fit is about renewable capacity: the wonder rewards a grid built on Wind Farms, Solar Farms, Geothermal and Hydroelectric plants, so the host should be an empire with hills and coastline for wind, flat open land for solar, and Dams already standing on its rivers. The city itself only needs the production to finish it quickly, since the power boost applies to renewable improvements across your empire. Keep one river tile beside the planned Neighborhood unimproved from the moment Urbanization arrives.

Winning the race

Almost never contested. Synthetic Materials sits deep in the atomic era, the AI seldom builds Neighborhoods on rivers, and rival civilizations at that stage are pouring production into spaceports or armies. The race you are actually running is against the end of the game, so the question is whether your builders can finish it in a handful of turns. Late chops are enormous; a builder with the remaining charges on nearby woods, a Magnus governor, and one modern Great Engineer will usually complete it in under ten turns. The only warning sign worth respecting is a rival two techs ahead of you in the same column who already fields renewable plants, and even then the loss costs you only a few turns of a single city.

If you lose it: alternatives

Power is the thing being replaced, and the substitutes are straightforward: a Nuclear Power Plant covers an entire region cleanly if you keep it maintained, Hydroelectric Dams add power on every river city that already has a Dam, and Solar Farms on flat tiles need no wonder to work. If the goal was climate protection, Flood Barriers in coastal cities and switching Coal Plants off outrank the wonder outright. The production should go where the game is being decided: Exoplanet Expedition stages in a science game, Broadcast Centers and the last rock band tour in a culture game, or Mobile SAM and Giant Death Robot upgrades if a late war is looming.

Planning a district next to this wonder? Check its adjacency bonus →

Other wonders of the same era

Related guides

Last reviewed: 2026-10-03