Brennisteinsfjöll

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Brennisteinsfjöll (Icelandic pronunciation: [ˈprɛnːɪˌsteinsˌfjœtl̥], "Sulfur mountains") is a minor volcanic system, with crater rows and small shield volcanoes on the Reykjanes Peninsula in southwest Iceland.

Adapted from Wikipedia (CC BY-SA). Photography via Wikimedia Commons.