Underground

<n>Orange Phantom Quartz</n> with <n>Kaolin</n> or <n>Calcite</n> inclusions.

The <n>Großes Schauspielhaus</n> in Berlin, designed by <n>Hans Poelzig</n> in 1919. Photo by <n>Zander & Labisch</n>.

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Surrealist architectural rendering by artist and architect <n>Per Carlsen</n>.

Ice stalagmites in an abandoned mine in Slovakia. Photo by <n>Miroslav Zumrík</n>.

Zdjęcie stockowe „Ice Stalagmites Inside Abandoned Mine Banska” (579865504) | Shutterstock

The <n>Mir Mine</n>, an open-pit diamond mine in Mirny, Russia, owned by <n>Alrosa</n>.

The <n>Expressionist</n> interior of the <n>Grosses Schauspielhaus</n> in Berlin, designed by architect <n>Hans Poelzig</n> in 1919.

<n>JUDGEMENT</n>, a <n>Brutalist</n> digital artwork by artist <n>Darius Puia</n>.

The Fantastic Pit inside <n>Ellison's Cave</n> in Georgia. Photo by <n>Manuel Beers</n>.

AI artwork titled <n>Dreamy Cave Wedding</n> by visual artist <n>brik.work</n>.

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