Dalhalla – a rock amphitheatre – Sweden Underground

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One of the largest meteorites to ever hit the Earth’s surface landed approximately 380 million years ago in the county of Dalarna.
Acoustic measurements confirmed an unusually low level of noise at the bottom of the quarry. The sound trial also confirmed that the high, almost vertical rock walls produced a very good reverb without a disturbing echo. With its acoustically designed stage, and with the audience sitting in the amphitheatre, Dalhalla can now be compared with classical stages in Ancient Greece and Italy.