Grüner See (Green Lake) is a lake in Styria, Austria. During the winter, the lake is only 1–2 m deep and the surrounding area is used as a county park. However, during the spring, when the temperature rises and the snow melts, the basin of land below the Hochschwab mountains fills with water. The lake reaches its maximum depth of around 12 m from mid-May to June and is claimed to look the most beautiful at this time. Read more about it here.
There are numerous examples of long-living clonal colonies of trees, but there’s something magnificent about a 400-year-old tree able to survive in the middle of the desert without any known source of water. The fact that it stands alone since centuries is mind-blowing. The ancient mesquite tree in Bahrain is considered a natural wonder. The Tree of Life or Shajarat-al-Hayat is located about 2 km from Jebel Dukhan. To really appreciate the uniqueness of the mesquite, try to view it in Google Earth. You will see that it’s pretty far from any form of vegetation. Read more here.
Treehouse at the Krazy Kat Club speakeasy in Washington DC, 1921.