The Eye of Sauron?
What you're looking at is a top down view of a lava river rushing down a hill in Iceland. And yes, this is the actual speed at which it was flowing. Actual liquid rock at ~1250°C.
The Lochnagar mine crater on the 1916 Somme battlefields in France is the largest man-made mine crater created in the First World War on the Western Front.
Now, here is a little surprise from Mars (another one...). Perseverance's latest discovery at Jezero crater. Can't wait to hear about the result of the analysis of this one. Does not look like anything we ever have encountered before...
Credit: NASA/JPL-Caltech.
Norilsk's "blood lake" in Russia is a result of industrial waste from nickel and metal plants, causing severe pollutants with iron oxides and other pollutants discharged into the water.
Interstellar !
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Credit Andreas Karaolis