9. Forest Park’s Land Was Molded by a Glacier

Forest Park wasn’t always covered in spacious woodlands. Twenty thousand years ago, the Wisconsin glacier molded the ground and left behind the Harbor Hill Moraine, a collection of small mounds, which characterize what is known as “knob and kettle” terrain. Today, the 93-acre Gully within the park – a popular birding area for visitors – is an example of a glacial depression.