The Bentonite Hills in Utah, also known as the Purple Mountain, are a stunning landscape that resembles Mars with their colorful striped hills. Harsh midday light will definitely wash them out so I suggest visiting for sunset, sunrise, or blue hour.
The Bentonite Hills shown in these photos are located HERE: 38.414238, -110.785327
Park HERE: https://maps.app.goo.gl/PaSmGffJSubXBV1y8