On-street parallel parking is allowed on most streets in downtown. The posted time limits apply M-F until 6:00pm.
Parking near Main & Washington as well as Main & Nelson tends to fill up first. So if you see space on other nearby streets, grab it.
There are also several public parking lots. ONLY 3 of them do not have time limits as noted on the map below.
There are no fees for parking on street or in the lots.
All three of the long term parking lots are south of Randolph Street near the Visitors Center.
Here’s another map that is clickable, scroll in to see street names.