9500 Speny Rd., Kirtland, Ohio
This beautiful arboretum, established in 1931, is one of the largest in the country with 3,600 acres of land. Most of the land is designated as natural areas, with gardens occupying much of the remaining acreage. Thousands of plants thrive at Holden, including native wildflowers, gardens designed to attract butterflies, and a 20-acre rhododendron garden.
Guided tours are offered, or visitors can embark on a self-guiding tour of the natural areas and gardens, which are crisscrossed with over 20 miles of trails and walking paths. A lake and multiple small ponds attract waterfowl, and an observation blind attracts bird-watchers.
For children and teenagers, hands-on programs delve into environmental and science-related topics. On Friday mornings in the garden, presentations and walking tours with the experts are offered. The Corning Library offers further educational opportunities, ranging from field guides to rare books on botany.
Open daily except major winter holidays. Admission charged.