Ontario’s Hidden Underground World: Where to Experience Caves and Karst Safely
Beneath Ontario’s forests and farmlands lies a hidden world sculpted by water over millennia. Limestone bedrock dissolves drop by drop, creating underground rivers, cathedral-sized chambers, and sinkholes that swallow entire streams. This is karst terrain, and Ontario has thousands of these geological wonders tucked away in places most travelers never think to explore.
You’ve probably driven past cave entrances without realizing it. That roadside depression near Collingwood? Likely a collapsed sinkhole. The cold air rushing from rocks along the Niagara Escarpment? An underground passage breathing beneath your feet. These…
