As we draw the curtains on this subterranean adventure, it’s time to face the facts: the underground is no longer just the domain of moles, earthworms, and mysterious tunnel-dwelling creatures from childhood tales. It’s a space that’s not just teeming with life—albeit of a somewhat spidery variety—but with potential that, if we dare to dig a little deeper, could revolutionise the way we live, work, and play in our cities.