Emerald City: Everything You Need to Know About NBC’s Take on The Wizard of Oz Calling Emerald City ambitious is a bit like calling a tornado a rain storm; Singh aimed to use as little CGI as possible to capture the “original magic” in part through the use of soaring, fanciful scenery. That meant shooting on locations that required going to half of Europe — including a remote national park in Croatia, 15th Century castles in Hungary and the Park Güell in Barcelona. It looks as grand and cinematic as it sounds. Singh is known for his elaborate, gorgeous visuals and Emerald City continues that reputation. Landscape shots make the series feel otherworldly; interior shots inside castles and temples sing with vibrancy and ruthless attention to detail.