Decodon, pontederia and buttonbush (Photo by Caroline Tanguay/NCC)

Decodon, pontederia and buttonbush (Photo by Caroline Tanguay/NCC)

Westmeath Freshwater Caves, Pembroke

The Westmeath Freshwater Caves property is located in the northeast corner of the Ottawa Valley Natural Area. The 33.4 ha property is a dry, rocky upland landscape on limestone bedrock. Several large karst sinkholes occur near the shoreline and are connected to the underwater cave system – part of the largest freshwater aquatic cave system in Canada. This section of the Ottawa River is relatively remote and has experienced little disturbance, making it ideal for threatened and endangered aquatic species. Forest covers 95% of the property, and provides habitat for several nationally, provincially and regionally rare species.

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