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In the last two weeks I had the opportunity to visit two more states that were on my list: Montana and Idaho.
There are only the following 8 states remaining:
- North Dakota
Grand Prismatic Spring was noted by geologists working in the Hayden Geological Survey of 1871, and named by them for its striking coloration. Its colors match the rainbow dispersion of white light by an optical prism: red, orange, yellow, green, and blue. — From Wikipedia.
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