The house at the corner has a very large Magnolia Sieboldiana. This member of the Magnolia family is typically not hardy here (zone 6 in Toronto). The hardy varieties, e.g. Star and Saucer, bloom before their leaves are out. The Sieboldiana blooms in June, after the leaves are out, and over a long period of time - about a month. The scent of these blooms is somewhat different than the other magnolias. Their scent is a combination of melon and lemon - wonderfully refreshing. The Sieboldiana has an additional floral element of lilac and jasmine. It is quite divine, so worth searching out!
Here's a portrait I did earlier in the week.