Walter de Maria's 1977 avant-garde work consists of 140 tons of gently sculpted soil (22 inches deep) filling 3,600 square feet of space of a second-floor gallery maintained by the Dia Art Foundation. You cannot touch, tread on, tease, or otherwise molest the dirt, nor can you take its photo. If you like the work, check out de Maria's Broken Kilometer, a few blocks away at 393 West Broadway.
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