The Grand Opera House
Greenbank Mill  Living History museum with a gristmill, textile mill and farm with heritage livestock. Step into the past; participate in the day-to-day lives of the people who worked here [1790-1830]. Each week a different focus. Open Fridays and Saturdays 10 AM - 4 PM [April to Mid-December].
Hagley Museum & Library
Holy Trinity Church & Hendrikson House Museum
Immanuel Episcopal Church Historic Sites
Kalmar Nyckel Foundation
The New Candlelight Theatre
New Castle Courthouse Museum
The Old Liberty Museum
Opera Delaware
The Nemours Mansion & Garden
Theatre N at Nemours
Wilderness Canoe Trips
Wilmington & Western Railroad
Winterthur, An American Country Estate

Tell them you saw their web site on allvacation.info.