Even more holes than Blackburn, Lancashire.

At 1m diameter and 75cm deep, so ~0.59m^3, I calculate that to fill the Albert Hall, which a search suggests "has been estimated at" ~100,000m^3 (feels low to me, but it's quoted in many places), it takes around 170,000 of these Peruvian holes.

There’s an Albert Hall where I live, it’s probably much smaller than its name sake.

I think we can fill it.