Which festival transforms a greenfield site into an immersive city of music and performance for a weekend?

Boomtown

Boomtown is known for turning a greenfield site in the English countryside into a temporary immersive city with themed districts, hidden venues, and live performances. The festival mixes large-scale set design, music, and theater to create a fictional world rather than a standard concert site. That city-building concept is what makes Boomtown stand out.