We visited the Abraham Lincoln Presidential Museum and Library. The musem is great. It takes you through his whole life, not just his presidency. Very informative and well executed. We spent over 2 hours there.
The Museum complex includes Springfield Union Station
We toured the Lincoln Family Home which is a National Park Service. They have bought all of the surrounding homes that existed when Lincoln lived there.
Finally, we visited Lincon’s Tomb where he and his family were laid to rest (except for his oldest son who is in Arlington).