The Boston Custom House Block on Long Wharf. The Carson Mansion in Eureka, now the home of the Ingomar Club (closed to the public). The Carson Mansion in Eureka, now the home of the Ingomar Club (closed to the public). The Carson Mansion in Eureka, now the home of the Ingomar Club (closed to the public). The Carson Mansion in Eureka, now the home of the Ingomar Club (closed to the public). Spiral staircase in the U.S. Treasury Building in Washington, D.C.