Woodlands describe various ecosystems dominated by trees, shrubs, and other vegetation. Conditions can vary greatly depending on the surrounding environment. For example, an Amazonian rainforest is technically a woodland, though, it is an entirely unique ecosystem compared to a temperate forested woodland found in Illinois. That said, all forms of woodland have the same overall functions and benefits. The trees and other vegetation are natural carbon sinks that filter both air and water while providing food and shelter for wildlife.

The woodlands at the Heritage Quarries Recreation Area consist of a mix of forested and savannah woodlands. Unfortunately, invasive plant species such as honeysuckle, buckthorn, tree-of-heaven, and oriental bittersweet dominate native plants.