St. Andreas Castle stands by Lake Zug in Cham, a handsome private castle surrounded by old trees and shoreline views. The building itself is not generally a museum stop, but its silhouette and grounds make it one of the more memorable historic landmarks around the lake.
It is best approached as part of a lakeside walk from Cham rather than as a standalone excursion from Zug. The appeal is the combination of castle, water, and mountain backdrop, especially in clear evening light.