http://en.wikipedia.org/wiki/Mt._Cuba_Center

Mt. Cuba Center, the former
home and gardens of Mr. and Mrs.
Lammot du Pont Copeland, is a
630 acre non-profit organization
set in the rolling hills of northern
Delaware. Our mission is to
foster an appreciation for
plants of the Appalachian
Piedmont and the conservation
of their environment through
garden display, education,
and research.