![](https://k-5impactnewsgk-1.mheducation.com/wp-content/uploads/2020/01/IS_K-1_NEWS_JAN_2020_003P.jpg)
Look at this sea cave. It is on Lake Superior. Check out the opening in the rock. In summer, you could paddle a boat through it.
Photo Credit: earleliason/E+/Getty Images
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