What was the first National Park? Yellowstone. Where is that Park? Wyoming.What was the first National Monument? Devil’s Tower. Where is that monument? Wyoming.If there is one thing memorable about Wyoming, it is the empty spaces, beautiful mountains, and interesting rock formations. Unlike those of the Southwest USA, these formations are volcanic dark rock, like Devil’s Tower, or white silt, chalk, or lighter sandstones.The US Congress created Yellowstone.Theodore Roosevelt created the first national monument.Having worked as a cowboy of sorts in the 1880s, he came to love this area of the West and could not imagine this odd lava column ...