In the H2 Oh! walking tour, visitors discover the evolution of waterpower at Hagley from the water wheel to modern waterpower and how the DuPont Company harnessed the power of the Brandywine to make black powder for over 120 years. It is a journey of innovation through the Hagley Powder Yard, including a stop at Hagley’s recently restored turbine bringing green energy back to the site. 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.