The Run Down

Here's a fun fact for this guide. About 425 million years ago, Chicago was actually located south of the equator in a tropical sea. You can see evidence of that in small pocket of Lake Michigan where the compressed remnants of a coral reef still sit today. It's an area that is teeming with underwater life, and we'll be grabbing our snorkel gear and exploring it with this guide. After we step out of the water, we'll end our outdoor adventure exploring a quiet bird sanctuary tucked back into a small corner off Lakeshore Drive. Here are the details:

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