Organ Pipes National Park
... that Australia's Organ Pipes National Park, which has 400-million-year-old volcanic formations, features hexagonal basalt columns known as the "Organ Pipes"?
... that Australia's <b id="mwFrI"><a href="./Organ_Pipes_National_Park" id="mwFrM" rel="mw:WikiLink" title="Organ Pipes National Park">Organ Pipes National Park</a></b>, which has <span about="#mwt84" class="nowrap" data-mw='{"parts":[{"template":{"target":{"wt":"Nowrap","href":"./Template:Nowrap"},"params":{"1":{"wt":"400-million"}},"i":0}}]}' id="mwFrQ" typeof="mw:Transclusion">400-million</span>-year-old <a href="./Volcano" id="mwFrU" rel="mw:WikiLink" title="Volcano">volcanic</a> formations, features hexagonal <a href="./Basalt" id="mwFrY" rel="mw:WikiLink" title="Basalt">basalt</a> columns <i id="mwFrc">(pictured)</i> known as the "Organ Pipes"?