So treat yourself to a "Green Garden," take a seat on ... of the Gärtnerplatz district, the roof terrace at the iconic Hotel Deutsche Eiche boasts an amazing view of many of Munich’s landmarks.

a group of office workers is busy harvesting the fruits of their labour on the roof of a Hong Kong skyscraper. Invisible to those below, a sprawling garden of radishes, carrots and rhubarb is ...