What city is closest to the middle of the United States?

I'm curious to know, which city lies closest to the geographical center of the United States? Is it a bustling metropolis, or a quaint small town? And how did it come to be considered the midpoint of such a vast country? I'd like to learn more about its history, culture, and any unique features that make it stand out. Additionally, I'm wondering if there are any landmarks or attractions nearby that might be worth visiting for those interested in exploring the heart of America.