This circa-1866 mansion with spectacular seasonal gardens reopened in 2010 after an extensive, expensive renovation. The result is worth a visit: Now run year-round by the City of Toronto, the museum gives visitors a sense of domestic life in Toronto in the 1920s and ’30s. The garden is also themed: It’s a Victorian-Edwardian masterpiece. The Austin family occupied the house from 1866 to 1980, and successive generations modified and added to the house and its decor. An annual Gatsby-themed party fills the grounds with flappers every June. The party is more than Prohibition-era cocktails and costumes; croquet, silent-film screenings, and dancing make this a memorable celebration of pre–Depression decadence. It sells out quickly.

Park Yourself Here—Spadina House is the next-door neighbor of Casa Loma. Between the two is a small but lovely park that is almost hidden by the trees that shade it. Many visitors don't notice it, but locals love it. Grab a bench here if you want to take a breather.