The lilac blue flowers at the base of the waterfall are Hypoestes aristata, next to the Bird of Paradise, Strelitzia regina. Sword Agave - last seen in the Hotel gardens in Madeira... The Glasshouse at RHS Wisley https://www.rhs.org.uk/gardens/wisley https://www.rhs.org.uk/gardens/wisley/Articles/Greenspiration-at-Wisley