Basalt in the Czech Republic
Basalt in Stolpen, Saxony
Basalt stack at the Faroe Islands. In Faroese, such a stack is called "stakkur"
Giants causeway, Ireland
Basalt in the Ore Mountains (Czech Republic)
Los Órganos, La Gomera, Canary Islands
Des orgues basaltiques dans le Jökulsárgljúfur, en Islande