The Claim is Richland, Washington

From Wikipedia, I've never been there.

Richland is a city in Benton County, Washington. It is located in southeastern Washington state at the confluence of the Yakima and the Columbia Rivers. As of the 2020 census, the city's population was 60,560. Along with the nearby cities of Pasco and Kennewick, Richland is one of the Tri-Cities, and is home to the Hanford nuclear site.

Richland was a small farm town until the U.S. Army purchased 640 sq mi (1,660 km2) of land – half the size of Rhode Island – along the Columbia River during World War II, evicting the 300 residents of Richland as well as those of the now vanished towns of White Bluffs and Hanford just upriver. The army turned it into a bedroom community for the workers on its Manhattan Project facility at the nearby Hanford Engineering Works (now the Hanford site).