"The Niagara Glen was created about 8,000 years ago, when Lake Erie dumped water into Lake Ontario via a waterfall called Wintergreen Falls, which was located at the site of the present-day Niagara Glen. The park consists of a section of dry riverbed called Wintergreen Terrace (also known as the Wintergreen Flats) at the level of the Niagara Parkway, and a jut of land 36m (118ft) below called the Wilson Terrace. The hiking trails are all located on the Wilson Terrace. You begin with a walk down a spiral steel staircase that was built in 1908.
Bird-watchers spend a lot of time in the glen looking for American kestrels, black-capped chickadees, Bonaparte’s gulls, canvasback ducks, common goldeneyes, eastern phoebes, glaucous gulls, great black-backed gulls, greater scaups, herring gulls, house finches (probably the descendants of those released in New York City in the 1940s), lesser blackbacked gulls, lesser scaups, little gulls, northern orioles, oldsquaw ducks, purple finches, red-tailed hawks, ring-billed gulls, savannah sparrows, yellow-bellied sapsuckers and yellow warblers. This trail guide includes Cliffside Path, Eddy Path, Woodland Path, Terrace Path, Trillium Path, Cobblestone Path, and River Path."