Wenn man sie aus der richtigen Perspektive betrachtet, kann man Regenbögen offensichtlich auch als Kreis sehen. Hatte ich bisher noch nicht.
This rainbow is from the Lakhta Center skyscraper you can see not only panoramas of St. Petersburg, but also interesting effects, which low-earth inhabitants do not know. Only from such a height the usual rainbow after the rain can be seen in a new form and it will not look like a familiar arch, but as a full circle. This view is accessible from the cockpit of the tower crane, which is building a skyscraper, but visitors of the Lakhta 360 viewing platform, which will open on the last floor of the skyscraper, will soon be able to see an amazing rainbow.
(Direktlink, via Likecool)