Cache was initially called FSC-2011 Wilmington (still on log and cache) because the City of Wilmington owns this park (and Hoopes Reservoir) even though they are not close to Wilmington.

The third annual Delaware Challenge is back: First State Challenge 2011 sponsored by Delaware Geocachers! Now its moved to a fall event.
There are about 20 new caches spread across the state of Delaware by volunteer cachers to give you an appreciation for the great areas of the First State. These should all be fairly easy to find as they are either small or regular size with a maximum rating of 2/2.
To complete this challenge and be eligible for a small Challenge tag & certificate at the challenge event, you must complete the following:
1. You must find and log ALL FSC-2011 caches- both at the cache location and online.
2. Record the code phrase written in the log book of each hide and email your completed list of all FSC-2011 code phrases to FSC2011@aol.com
3.For your convenience, there is a form on the Delaware Geocaching Website at First State Challenge 2011 - Form although the use of this form is not required.
4. There will be a Challenge Event (12/10 in Dover) open to all cachers. At this event, those that have been verified as completing the challenge, will be eligible for a small Challenge tag and Completion certificate.
5. The small Challenge tags are limited to the first 100 cachers who complete the challenge.
6. More information can be found on the Delaware Geocachers FSC-2001 Page First State Challenge 2011 or on the forum page First State Challenge 2011 Forum
Description:

Valley Garden Park is located in the chateau country of the Brandywine Valley. The park offers paved walking trails set amid a shallow river that is landscaped with miniature waterfalls.
A former DuPont estate, Valley Garden Park was a gift to the city of Wilmington in 1943 from Ellen du Pont Wheelwright. She gave the former summer estate of her parents, T. Coleman and Alice du Pont, so that "others might enjoy, in peaceful surroundings, the beauty that was inspired" by her mother