Actualy we have many places in the capital region worth visiting. Parliament Hill (Centre Block free guided tour), Rideau Hall, Museum of Civilization (free entry every Thursday afternoon, not sure now ), Gatineau National Park, National Gallery, Royal Canadian Mint, War Museum, Ottawa River tour, Rideau Canal tour, and much much more... Well, if you run out of places, and if they've never been there, you can bring them to Montreal for a day. Enjoy.:lookaroun