Looks like the “King of Country” is selling one of his castles. According to the San Antonio Express-News, George Strait is selling his adobe mansion—The Dominion—in San Antonio, Texas. The 7,925-square-foot home sits on 12.2 acres and features three bedrooms, four full bathrooms, a guest house, infinity pool, 14 fireplaces, sauna, gym, safe room, patio…