Last week, Quebec cavers announced that they had discovered large underground galleries under a park in Montreal.
“The mysterious cave of Saint-Léonard has not finished revealing its secrets: two speleologists have recently discovered galleries there, 15,000 years old. Last month, cavers Daniel Caron and Luc Le Blanc removed debris obstructing a crack in the cave located in Pie-XII Park. It was there that they discovered an impressive gallery, unknown until then. "
Source: Radio-Canada