Neugrund meteorite crater which was created almost 540 million years ago is situated near seismologically active Osmussaare, in the bottom of the sea. With a diameter of 20 kilometres it is the biggest meteorite crater in Estonia. The craters existence was only confirmed in 1998. Above the round mould the diameter of the crater is 7–12 kilometres, its depth up to 5 kilometres. As a remembrance of the meteorite explosion one can find many gneiss breccia boulders in the northwest of Estonia. For example, in Osmussaare there are at least 60.
Interesting facts: Neugrund is one of the world’s best preserved craters located in the bottom of the sea and it is accessible even for ordinary divers as the round mould becomes denuded at 25-metres’ altitude.