Tommy Thompson Park, just minutes away from downtown Toronto, is a unique urban wilderness that offers some of the best bird watching in the city – with more than 300 species. The Leslie Street Spit – the land on which this park now stands – was entirely manmade, composed of landfill, concrete, bricks and rebar. Today, this 250-hectare park (617 acres) is operated by the Toronto and Region Conservation Authority. It has become an oasis for walkers and cyclists, and remains the habitat of birds, mammals, reptiles, amphibians and fish. As part of Digital Doors Open, download their birder’s checklist, read their research reports on breeding birds, explore the site through the video below, and watch the acclaimed documentary (from CBC’s The Nature of Things, 44:18).