- 1907: James Casey founded the company that would later become UPS on this site.
- 1948: James Casey started the Annie E Casey Foundation, named for his mother, which sponsors NPR among other things.
- 1978: The Annie E Casey Foundation built this park.
- 1981: The park won a landscape award from the American Association of Nurserymen.
- 2017: The En Plein Air Coffee Club will convene on 6th January 2017 at 8am for coffee at Waterfall Garden Park. The park opens at 8 so it’s possible that the gate might be closed if you get there early. Here’s a map.
A result of largesse from UPS