Tucked behind an old water-treatment plant (now Northside Park) and a recycling plant, quiet Heron Pond is the perfect place for solitude and stellar bird watching. Located on the South Platte River Greenway going north from downtown, the park is home to a huge variety of birds, including herons, avocets, kingfishers and red-tail hawks, as well as numerous kinds of water fowl. And because it's so quiet here, they aren't likely to be scared away by a dog let loose by an inconsiderate condo-dweller. There may be more scenic rides around town, but when it comes to Sunday solitude, Heron Pond soars above the rest.