Mundus Subterraneus

Part of an exhibition at Nottingham Contemporary on caves; Nottingham has a network of 800 caves underneath the city.

Back blip from 4th, as rough today following my covid jab.
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The illustration is .a page from the 1665 book Mundus Subterraneus, quo universae denique naturae divitiae -  (The Subterranean World: All its Riches)

Athanasius Kircher proposed that the Earth's interior was crisscrossed with interconnecting channels of fire following a visit to Vesuvius.