THERE’S something happening in Toronto. While so many cities lament the global economic crisis and the dulling effects of globalization, boutiques and restaurants seem to open every week in Toronto, and immigrant neighborhoods still feel linguistically, gastronomically, gloriously, distinct. The cultural diversity and urbanity seem limitless. But it’s hardly an urban jungle. Toronto is filled with lush, insistent greenery and an abundance of parks. It’s hard to imagine a better city to explore in summer.