The first-ever meeting between the world's first all-metal airliner (Junkers F13) and horse railcars just couldn't happen in a different spot than the East Frisian Islands (in the past and today a popular place to unwind), equipped in the 19th century with narrow-gauge railways and air-linked with Berlin in the 1920s through the so-called Bädeluftverkehr (bathing air transport).
The presented picture was taken on the Langeoog island in the first half of the 1930s (horse traction was used till 1936). The motorised railway (gauge 1,000 mm) still joins the ferry harbour on the island's south coast with its 'capital' by the open sea (distance 2.6 km), though nowadays it bypasses the airport.
Also, one cannot take a direct flight to Langeoog from Berlin anymore. The only regular air service links LGO during the summer season to another Frisian island, Wangerooge (code AGE), the one that's connected to the closest mainland airports.