Aerial view taken on July 6, 2017 shows an invested garden at the Grosser Garten park of the Herrenhaeuser Gaerten in Hanover, northern Germany. / AFP PHOTO / dpa / Julian Stratenschulte / Germany OUTJULIAN STRATENSCHULTE (AFP)Aerial view taken on July 6, 2017 shows an invested garden at the Grosser Garten park of the Herrenhaeuser Gaerten in Hanover, northern Germany. / AFP PHOTO / dpa / Julian Stratenschulte / Germany OUTJULIAN STRATENSCHULTE (AFP)Aerial view taken on July 6, 2017 shows an invested garden at the Grosser Garten park of the Herrenhaeuser Gaerten in Hanover, northern Germany. / AFP PHOTO / dpa / Julian Stratenschulte / Germany OUTJULIAN STRATENSCHULTE (AFP)Aerial view taken on July 6, 2017 shows an invested garden at the Grosser Garten park of the Herrenhaeuser Gaerten in Hanover, northern Germany. / AFP PHOTO / dpa / Julian Stratenschulte / Germany OUTJULIAN STRATENSCHULTE (AFP)Aerial view taken on July 6, 2017 shows an invested garden at the Grosser Garten park of the Herrenhaeuser Gaerten in Hanover, northern Germany. / AFP PHOTO / dpa / Julian Stratenschulte / Germany OUTJULIAN STRATENSCHULTE (AFP)