The U.S. Army established Fort Churchill in July 1860 to protect wagon roads and settlers in the region following the bloody battles that year between settlers and the Native Americans.
The interior of the Eureka Opera House includes a well-preserved olio, or stage curtain, featuring advertisements for local businesses. The institution dates to 1874.
Eureka County built its courthouse in 1879. The courtroom includes original pressed tin ceiling and wood features. An nook for the court clerk in front of the judge's bench is noteworthy.