A 5km-long artificial peninsula between the Harbourfront and the Beaches, Tommy Thompson Park reaches further into Lake Ontario than the Toronto Islands. This 'accidental wilderness' – constructed from Outer Harbour dredgings – has become a phenomenal wildlife success. It's one of the world's largest nesting places for ring-billed gulls, and is a haven for terns, black-crowned night herons, turtles, owls, foxes and even coyotes.
It's open to the public on weekends and after 4pm on weekdays; vehicles and pets are prohibited. Summer schedules offer interpretive programs and guided walks, usually with an ecological theme. At the end of the park there's a lighthouse and great city views. To get here, take any streetcar along Queen St E to Leslie St, then walk 800m south to the gates, or follow the Martin Goodman Trail.