Iron Hill Museum & Science Center

Delaware’s Oldest Natural History Museum, in Newark’s Own Backyard

Fossils, Minerals, Lenape History, and a Fluorescent Rock Room — All Free, and All Hiding in Plain Sight Just Off Old Baltimore Pike

There is a persistent pattern among long-established small natural history museums: they tend to be considerably more interesting than they appear from the outside. Iron Hill Museum & Science Center, Delaware’s oldest natural history museum, follows this pattern faithfully. Tucked into Robert L. Melson Lane near Newark — practically in the shadow of the University of Delaware — it occupies a purpose-built 2016 science center adjacent to the original 1923 schoolhouse where the museum’s collections were housed for nearly 50 years.

The museum is open Tuesday through Friday, 10:00 a.m.–5:00 p.m., and Saturday, 12:00 p.m.–4:00 p.m. The museum is closed on Sunday and Monday. Admission is free; donations are welcome and support ongoing programs and collections.

The Building and Its History

The Iron Hill Museum story begins with two structures, each carrying its own significance.

The Original Schoolhouse (1923)

Iron Hill School No. 112C was built in 1923 by Pierre S. du Pont — the same industrialist and philanthropist behind Longwood Gardens — as a schoolhouse specifically for the African American students of the Iron Hill Village community. At a time when Delaware maintained rigidly segregated public education, du Pont funded the construction of more than 80 schoolhouses for Black children across the state. Iron Hill’s schoolhouse was one of them.

The Delaware Academy of Science adopted this building as the home of its natural history collections in 1968 and operated the museum there for nearly 50 years. In 2016, the collections moved to a newly constructed Science Center on the same property. The original schoolhouse remains standing and accessible; visitors who ask a staff member will be taken over to see it, connecting the natural history mission to an important chapter in Delaware civil rights history.

The Science Center (2016)

The current Iron Hill Science Center was designed specifically for the Delaware Academy of Science’s collections and programming, providing modern exhibit space and improved accessibility while maintaining the community-focused character that has defined the museum since its founding.

Trivia: Iron Hill itself — the geographic feature for which the museum is named — sits near the Delaware/Maryland border and reaches approximately 400 feet above sea level, making it one of the highest points in Delaware (a state not exactly celebrated for its mountainous terrain). The hill’s distinctive jasper rock formations were used by Indigenous peoples to make tools for thousands of years before European settlement.

The Exhibits

Iron Hill’s permanent collection focuses on the natural sciences of the Mid-Atlantic region, organized to provide visitors with an accessible entry point to geology, paleontology, zoology, botany, and Indigenous history.

Please Touch Wall

One of the museum’s most popular features, particularly for younger visitors, is a hands-on display where guests can touch actual specimens, including turtle shells, petrified wood, and other natural objects. In a world of “do not touch” museum culture, this is a genuine point of difference.

The Lenape People

An interpretive exhibit on the Lenni Lenape — the Indigenous people who inhabited the Iron Hill region and the broader Delaware Valley for thousands of years before European settlement. The exhibit focuses on the materials Lenape people used from their natural surroundings, connecting cultural history to the natural history collections surrounding it.

Rocks and Minerals

A collection of specimens from Delaware and from around the world, demonstrating the diversity of geological processes that produced the materials beneath our feet. The Iron Hill area’s jasper deposits are a specific regional focus.

The Fluorescent Rock Room

Specimens that change color dramatically when exposed to ultraviolet light — a reliably crowd-pleasing exhibit that demonstrates a genuinely fascinating physical phenomenon. This is one of those exhibits that works equally well for five-year-olds and adults who weren’t geology majors.

Delaware’s Prehistoric Sea Life

An exhibit on the creatures — including mosasaurs and other Cretaceous marine fauna — that inhabited the shallow sea that once covered what is now Delaware. The state’s coastal plain geology preserves a remarkable record of this prehistoric ocean environment.

Taxidermy and Wildlife

A natural history collection of mounted specimens spanning mammals, reptiles, amphibians, birds, and fish native to the Delaware region, providing a visual overview of the region’s biodiversity.

Programs and Nature Trails

Iron Hill offers an active educational programming calendar with particular emphasis on school groups, home educators, and children’s programs. Earth science programs allow groups to spend time rock collecting at nearby Iron Hill Park. Nature walk trails connect the museum property to the Mason-Dixon Trail, and Iron Hill County Park is a short drive up Whittaker Road.

Iron Hill in the Newark/New Castle County Context

Iron Hill Museum sits in Newark — home to the University of Delaware — in southern New Castle County, roughly 12 miles southwest of Wilmington and about 5 miles from the Delaware/Maryland border. It pairs naturally with a visit to White Clay Creek State Park for a full day of outdoor and natural history, or with the Delaware History Museum in Wilmington for a broader exploration of Delaware’s past.