An honest-to-goodness 20th-century castle, Casa Loma has 98 rooms, two towers, creepy passageways, and lots of secret panels -- and excellent views of Toronto. Check out the giant pipe organ, the reproduction of Windsor Castle's Peacock Alley, the 60-ft-high ceiling of the Great Hall, and the mahogany and marble stable. Architecture lovers will be fascinated by the rooms copied from English, Spanish, Scottish, and Austrian castles. Wear sensible shoes. COST: $10.