Ottawa Visitors Center Share: Travel Illinois 100 West LaFayette Street Ottawa, IL 61350 815-434-2737 About Map About The Ottawa Visitors Center is conveniently located across from historic Washington Park in scenic Old Town. Quaint shops featuring specialty items and antiques abound. Relax with a coffee or libation in one of our outdoor cafes. Pick Us! What's Nearby? Distance: 5 10 15 20 25 50 mi.