Salvation Mountain
Salvation Mountain is a literal man-made mountain 28 years in the making, covered in half a million gallons of latex paint. What started as a small monument made of dirt and painted cement became, over time, a sprawling adobe and hay-bale mountain complex, with peripheral structures made of telephone poles, tires, and car windows, as well as art cars and sculptures, all painted in a patchwork of stripes and color blocks of whatever paint was donated that week.
— Aaron Huey, National Geographic
This is a must see attraction, just past the Salton Sea.