Gernot Spielvogel is a German marine geologist who has studied the Atlantis question for over 15 years and has concluded that it had been located in or near the Azores. He attributes the destruction of Atlantis to an encounter with a comet which split into seven pieces, some of which landed in the Alps and Vietnam as well as the Azores region. He claims to have fragments of the impactor as well as artefacts to support his theory on display in the Atlantis-Institut in Überlingen on Lake Constance.