Know Before You Go:
If you’re visiting, or traveling in, Wilmington & the Brandywine Valley or throughout Delaware, it's important to do so safely. Learn what plans are in place and what steps to take to ensure your safety during COVID-19.
Visitors explore the geology of the Brandywine Valley and its impact on the milling industry. Take home a piece of Delaware Blue Rock as a souvenir. Included in regular admission and free for Hagley members. Reservations requested by calling (302) 658-2400, ext. 261. Use Hagley’s main entrance off Route 141 in Wilmington, Delaware. Please note that this event is weather-dependent and involves walking on uneven ground.