This is how the morning's gone: A post on Boing Boing led me to this site, which links to Art World magazine, which has an article (not online) about Alan Gibbs, who commissions really large artworks from folks like Anish Kapoor, Richard Serra, and Andy Goldsworthy for his sculpture park in New Zealand called the Farm, which is closed to the public, I guess.
There are a couple shows on Alan Gibbs (and, presumably, the Farm) available on the NZ TV station that aren't loading for me. There are a few one-off links about the place: Tony Oursler's Skull, a film about Richard Serra's Tuhirangi Contour, but this site, Culturepublic, has pictures not reproduced elsewhere (swiped from Art World piece, I guess), like Neil Dawson's Horizons (top) and a work by Leon van den Eijkel.