Fairy rings vary a lot in their appearance but are usually harmless. If homeowners don’t like them, we have methods of removal to share - but no promises on the fairies themselves.
Fairy Ring Treatment and Control (Complete Beginner's Guide)
Fairy Rings in the Lawn and How to Manage Them - Nature's Select
Fairy Ring Champignons
Understanding Fairy Rings - Cliff Lamere
Preventing and Controlling Fairy Ring - Advanced Turf Solutions
Fairy Ring Creation, Superpower Wiki
Fairy Ring
How to Identify and Control Fairy Rings
Fairy Ring : r/battlemaps
Experts' Insights: Fighting fairy ring