Parent: underground – philosophy of place – culture

By medium: underground film – underground literature – underground press – underground music

“Ideas enter our above-ground culture through the underground. I suppose that is the kind of function that the underground plays, such as it is. That it is where the dreams of our culture can ferment and strange notions can play themselves out unrestricted. And sooner or later those ideas will percolate through into the broad mass awareness of the broad mass of the populace. Occulture, you know, that seems to be perhaps the last revolutionary bastion.” — Alan Moore

Related: alternative – banned – censorship – clandestine – controversial – counterculture – crime – cult – drugs – economy – forbidden – grotto – hidden – illegal – illicit – independent – a glossary of the non-mainstream – overground – prohibition – resistance – secret – subculture – subversive – taboo – transgressive – underworld – The Velvet Underground

Contrast: mainstream

Underground mining station, image sourced here.

A basement or cellar is an architectural construction that is completely or almost below ground in a building. It may be located below the ground floor.

The mainstream comes to you, but you have to go to the underground. – Frank Zappa

Interconnected underground stems are called rhizomes

Bibliography: Lipstick Traces, a Secret History of 20th Century (1989) – Greil Marcus – Outsiders as innovators (1998) – Tyler Cowen – Notes from Underground (1864) – Fyodor Dostoevsky