First Missouri State Capitol State Historic Site
"O'Fallon visitors may come for school trips, weekend sightseeing, or a convenient historic stop before exploring the St. Charles riverfront."
A preserved early-1800s capitol complex in downtown St. Charles where Missouri’s first legislature met.
Scott Joplin House State Historic Site
"O'Fallon residents can visit the site as part of a broader St. Louis metro itinerary. It is a worthwhile stop for anyone interested in local history and the roots of ragtime."
A restored St. Louis home honoring ragtime composer Scott Joplin and his lasting musical legacy.
Mastodon State Historic Site
"O'Fallon residents may visit for a unique educational experience that pairs well with other St. Louis-area attractions. The site is especially appealing to those interested in natural history and archaeology."
An Ice Age fossil site and museum in eastern Missouri.