The Tetraeder monument is a landmark of the German city Bottrop. It stands on a 90m hill with a height of 60m and a side length of 60m. Taken with an Osmo Mobile and a Samsung Note 4 It was a quite windy day. Originally I planned to take some arieals with a Phantom 3 Professional but the wind was too strong for a safe flight. Even the Osmo Mobile has some problem with the wind, especially since the phone is quite large. Some of the jerks are due to the wind.