Devils Tower Wyoming

Devils Tower, in the Northeast corner of Wyoming, was the first national monument in the United States, being established in 1906. It was formed by the intrusion of magma into surrounding rock formations, but beyond that there is discrepancy as to the exact process, and whether this intrusion event occurred below or at ground level.

Regarding the name of this national monument, the name is correctly displayed without an apostrophe, per a US geographical naming convention. Further, the term "Devils" was evidently a misinterpretation of a Native American term for the formation, and their name includes their term for "bear". - Martin van Hemert