Niagara Falls State Park, opened in 1885, is the oldest state park in the United States — and it exists because painters and writers campaigned for two decades to tear down the mills and fences that had walled the gorge off from public view. The campaign was called Free Niagara. Its argument was moral as much as aesthetic: a cataract of that scale should not be a private turnstile. Frederick Law Olmsted, who had already laid out Central Park in the city where a nyc to niagara falls 2 day tour now begins, designed the reservation with deliberate restraint. He refused ornamental planting. He wanted native woodland, narrow paths, and the water left to speak for itself. That principle still governs the grounds at 332 Prospect Street, where entry to the park costs 0 USD and the gates never close — the park is open 00:00–23:59, seven days a week. The geology is younger than the tourism. The Niagara Escarpment, a ridge of Lockport dolomite laid down some 400 million years ago, caps softer shale beneath. Water undercuts the shale; the dolomite cap collapses. By this mechanism the falls have retreated roughly eleven kilometres upstream from Lewiston since the last glaciation, carving the Niagara Gorge behind them. Erosion has slowed markedly since 1950, when hydroelectric diversion treaties began routing water to power stations on both banks — a compromise between the Robert Moses plant and the tourist season, with fuller flow released by day in summer. Three cataracts make up the whole: the American Falls, the slender Bridal Veil separated by Luna Island, and the Canadian Horseshoe Falls, which carries about ninety percent of the volume. Goat Island sits between them, reached by bridges Olmsted routed low to the water. Prospect Point Observation Tower cantilevers over the gorge; below it, the Maid of the Mist has run since 1846, the oldest continuously operating tourist attraction on the continent. What draws travellers on a nyc to niagara falls 2 day tour is partly the arithmetic of distance. Roughly 400 miles separate Manhattan from the gorge, a corridor that crosses the Hudson Valley, the Mohawk gap and the length of upstate New York. Overnight itineraries treat that distance as part of the subject rather than an obstacle. Illumination of the falls, first attempted in 1860 with Bengal lights and now delivered by LED arrays from the Canadian bank, gives the second evening its argument. New York landmarks rarely repay a second day so plainly.