Rollins Savanna is one of Lake County's best natural areas — around 1,400 acres of restored tallgrass prairie, oak savanna, and wetlands managed by the Lake County Forest Preserves. The restoration project has been underway since the 1990s, gradually eliminating invasive species and reintroducing native grasses and wildflowers. The results are visible in the diversity of wildlife the area now supports.
The savanna is one of the better birding sites in the Chicago metro area. During spring and fall migration it can be excellent, with shorebirds using the shallow wetlands and sparrows moving through the grassland edges. Year-round residents include bobolinks, meadowlarks, and sandhill cranes. The main trail loop runs about 3.5 miles through varied habitat. Wildflowers are at their peak in July and August.