Esperanza and Irwin leave their usual comfort zone and head into more uncharted territory. Calverton has the last, large swath of Long Island grassland, and has been protected to a degree. If you visit the area, there doesn't seem to be much development or planning, although proposals exist. It's home to an enormous FedEx distribution center, a large recycling business, along with tiny farmhouses and farms. We''ll tie in the Calverton Executive Airport, the Grumman Corporation's impact on LI, and its Memorial Park on 10 adjacent acres.