Find your way to US Route 45 (La Grange Road) and 67th Street.

Take 67th Street east to the first and only traffic signal (East Avenue/Santa Fe Drive).

Turn RIGHT (south) onto Santa Fe Drive/East Avenue, cross two sets of RR tracks, go under the expressway, and proceed to the big ole Humpty Bridge (Leon Cook Drive).

Cross the bridge (Leon Cook Drive) and turn RIGHT where the street T-bones (onto River Road). Barring apocalyptic environmental disasters of unspeakable horror, you will have seen the caboose/visitor center by then.

Printable Google Maps link might help, too.