The Union center point is around 12 miles north of Meramec Caverns and 18 miles west of Six Flags over St. Louis.
Below are reviews of the city of Union, MO from an actual visitor's perspective.
Came here as a trucker. Small town vibe, but plenty of things to do.
It's a nice place where the restaurants are great. We especially liked the White Rose for breakfast.
Very nice town and area.
Diverse community and clean small city!