When Robert Morris converted an abandoned gravel pit into an earthwork in 1979, he didn't intend to cover up the land's past abuse and turn it into an idyllic setting. He carved his pit into pleasing curves but left human-height tree stumps, coated in black creosote, for all to see. Over the years, another unsightliness came into view: rampant blackberries. So, in April, a Vashon Island rancher named Tammy Dunakin let her herd of 60 goats clean up the place. It's as good as old. (Johnson Pit #30, S 216th St and 40th Pl S, SeaTac, 296-7580. Daylight hours, free.)