- Yields: +1 Food, +1 Production
- Movement needed: 1 MP
- Defense provided: +3
- Additional traits:
Reefs are an aquatic terrain feature found along the coastline. They block the construction of Harbors, Water Parks, and wonders, but are otherwise very valuable on their own. They increase the Food and Production potential of their tile and provide a Combat Strength bonus to units defending there. They can also contain Fish and Turtles and thus accept the Fishing Boats improvement, which makes them even more valuable.
Reefs form beneath the surface of open water and serve as speedbumps for ships. Though some are composed of inorganic material such as sand, rock, or accumulated shipwrecks on reefs made of sand and rock, the most vibrant are coral reefs found in tropical waters.