Ontario's Natural Underground Wonder
A Family Owned and Operated Site


There are different types of fossils that can be seen at the caves!

Under a hill of limestone, said by geologists to have been the bottom of a tropical sea 500 million years ago, the Caves present a weird and wonderful sight. Stalactites, or rock icicles formed at the rate of one cubic inch in 150 years, hang from the ceiling and the handiwork of nature is enhanced by electric lights. Entombed in the rock and preserved forever can be seen fossils of coral and sea creatures alive long before the age of the Dinosaurs. Millions of years in the making, the Bonnechere Caves are a thrill for the sightseer.

Geological Time Chart

The limestone you walk through when you visit the Bonnechere Caves was deposited as layers of mud and silt during the Ordovician time period.

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