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Not the kind that flatten your tires in the spring, these potholes are of glacial origin. In the vicinity of the Eramosa River, there are over 200 potholes that vary in size and diameter. They were created by hard debris like pebbles and boulders that were left by the Wisconsin glacier and caught in eddies in rapidly flowing melt water, making holes in the bedrock (some several metres deep) over the course of thousands of years.
Explore the limestone ruins of a small woolen mill that operated from the 1880s until the 1930s. The stone structure replaced a wooden mill that burned down in the early 1880s. Today's ruins have been preserved since most of the structure was destroyed by arson in 1967.
The caves include stalactites, columns and flowstone. Long pants and long sleeves, a flashlight and helmet are suggested. The caves are only accessible in spring and summer; the caves are occupied by hibernating bats in autumn and winter.
A sandy beach on the Eramosa River is located within the park. No lifeguards are on duty.