Lailah J.
Yelp
Wilmington, DE - we visited several du Pont estates during our stay in the beautiful Brandywine Valley area, starting with the Hagley Museum, which is the place of the first du Pont family home, built by the French immigrant ancestor who started it all, Éleuthère Irénée du Pont.
We toured the house (Eleutherian Mills) and garden, powder yard, saw a small antique car exhibit, a gunpowder demonstration, and strolled around the grounds, which are very walkable and well-shaded in parts, but there is also a shuttle that travels between the main areas (visitor center/museum, house, powder yards) which runs every 20 minutes.
The property is impeccably maintained and gorgeous to walk around, bordered by the Brandywine River where we saw some kayakers row by (for paddlers & outdoor enthusiasts: you can do this as an activity in the area).
Everything was SO well-organized, and the tour guides & staff could not have been more lovely or helpful. They helped us time-manage our tours (as we arrived late in the day and were in a bit of a rush) and were generous with answering questions and sharing information about the history of the place and of the du Pont family.
=======
TIP:
If you love museums and historic homes & gardens and plan to visit at least a couple, the best thing you can do is purchase a Brandywine Treasure Trail Passport ($49 for individuals, or $99 for family including 2 adults & 3 children 17yo and under), which grants you admission to 12 area attractions that you can visit once any time between May 24-October 31. (This year is almost over but you can still buy the 2025 pass or wait for 2026 to be released.)
There were many enterprising du Pont descendants/cousins, and the multiple grand estates in this area were built/owned by different branches of the family: in addition to Hagley there is also Winterthur, Nemours, Mt. Cuba Center, and Longwood Gardens - all of which are included in the passport.
I find these properties to be more impressive than the Newport RI mansions, and highly recommend visiting as many as you can!