Created to commemorate the birthplace of the United Parcel Service (UPS), Waterfall Garden Park is a private pocket park tucked away in an assuming corner of Main and Second Street. Designed by Sasaki, Dawson and DeMay—Masao Kinoshita of the Sasaki office served as the primary designer—Waterfall Garden Park may be small (it measures 60 by 80 feet), but the space imparts a strong, lasting impress…