Within the Staatspark Karlsaue at Kassel, Germany you can find a big lake – the Aueteich (wetland pond). Within there is an island called Schwaneninsel (swan island) you can’t reach unless you swim over or wait until the water is frozen in winter times. On the island you can see a neoclassical temple with a golden sphere on top: it symbolizes the planet jupiter and is part of the ‘Planetenweg‘ showing the distances of the planets in scale 1:495 millions.
When the Aueteich and the Schwaneninsel were created in the year 1710 the removed material was stored in the southwest and it became the foundation for the Blumeninsel Siebenbergen. There you can admire 30.000 flowers between April and October.