In the late afternoon, after Tom and Cathy had packed for the trip home, we went back to Waimea Valley to walk to the falls. The walk was through a tropical forest preserve/botanical garden, with a huge variety of beautiful flowers, trees and shrubs. The falls were really a bit anticlimactic, particularly with all the signs again about leptospirosis!
Later that evening we drove Tom and Cathy to the airport in time to catch their 10:15pm flight home. Seemed strange to go back to the house without them.