More than 150 historic buildings — theaters, breweries, mansions, cathedrals, hotels, museums — are open to the public, and many offer free guided tours.
More than three dozen in-depth walking tours also are offered but sell out quickly.
This year, the event is virtual.
The first North American town to be named a UNESCO City of Literature offers talks, readings, panels, exhibits and a walking tour of literary Iowa City.
This year, events and readings are online.
In the southeast corner of Iowa, 11 villages feature quilt shows, scarecrow contests, bake sales, tours of historic sites, wine tasting and street fairs.
There's a big scarecrow contest plus a carnival, music, dance and the Autumn on the Fox arts show in this town west of Chicago.
This year, the carnival and art show are canceled, but there will be a scarecrow stroll, drive-in concert, scavenger hunt, pumpkin carver and items to purchase, such as Scarecrow in a Box.
This studio tour in eastern Wisconsin includes more than 60 artists in Cedarburg, Grafton, Port Washington, Mequon, Thiensville and Newburg.