Anthropocene, Black, Sofia Borges, Brassaï, Caruso St John, Cave, Cave painting, Center for Land Use Interpretation, Dark, Darkness, Degas, Fire, Barry Flanagan, Fourth Plinth, Leo Frobenius, Glucksman, Grotto, Alberto Giacometti, Hayward Gallery, Athanasius Kircher, Paul Klee, Goshka Macuga, René Magritte, Henry Moore, Nottingham, Nottingham Contemporary, Elisabeth Pauli, Plato, Jackson Pollack, RAMM, Ben Rivers, Science fiction, Space, Subterrannia, Subterrannian, Technology, Threshold, Caragh Thuring, Underground, Vesuvius, Volcano, Mark von Schlegell, Jeff Wall, Joseph Wright of Derby