Kennewick outdoor memorial built around a ~30-foot steel beam recovered from the World Trade Center – a free place of reflection, with an annual 9/11 service.
Kennewick veterans memorial in Columbia Park – a 40-foot granite monument (said to be the tallest freestanding granite in the U.S.) honoring those who served.
Active Ice Age mammoth dig near Kennewick run by nonprofit MCBONES – reservation-only guided tours (mid-April–October, ~$10) of the Dig House and open excavation.
Kennewick’s history museum in Keewaydin Park (formerly East Benton County Historical Museum) – famous petrified-wood floor, Native American and pioneer artifacts, and local WWII/Manhattan Project history.