The last pic I saw of that bathtub, the water was filthy the boards were warping and it looked like trash. I thought it was on the Mojave preserve not private property, so I don't know how the artist got permission to put it there. Hopefully it was cleaned up...at his cost.
On this Utah art, I thought I read they cut the rock it install it. Not too smart.
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2006 Ford 6.0PSD EB-50/E-PH SMB 4X4 Rock Crawler Trailer