Spoilers

I kind of hate to spoil the random image thing I've got on this site by just showing them all off at once, but I obviously have to credit the artists where I can. There are a few background images that aren't included here—in cases where I can't find a meaningful credit, or where I actually made the image myself—so I guess there might still be a few surprises!

Also, I need to thank Aeron Alfrey, whose excellent Monster Brains blog provided loads of these images. No better place on the Internet to get awesome high-res scans of cool monster art!

Backgrounds

Caspar David Friedrich — Abbey in the Oakwood

Cenni di Francesco — The Temptation of Saint Anthony

Cover art from Air Wonder Stories (August, 1929)

Cover art from Air Wonder Stories (December, 1929)

Cover art from Popular Detective (April, 1937)

Ed Valigursky — cover art from The Best from Fantasy and Science Fiction: Sixth Series

Frank Frazetta — cover art from Lost on Venus

Frank Frazetta — cover art from Swords against Darkness

Giuseppe Galli Bibiena — Monumental Vaulted Hall with Staircase

Greg and Tim Hildebrandt — cover art from Earth's Last Citadel

H.R. Giger — Landscape XXII

H.R. Giger — title unknown

Hex map from Castle Book II

Hex map from Gamma World (3e) boxed set

Hex map from Undead

Hieronymus Bosch — detail from The Garden of Earthly Delights

John Martin — Pandemonium (1824)

John Martin — Pandemonium (1841)

Joos van Craesbeeck — The Temptation of Saint Anthony

Karl Friedrich Thiele — set design for The Magic Flute, Act I, Scene I

Katayama Bokuyo — Forest

Ken Kelly — color insert from Marchers of Valhalla

Ken Kelly — color insert from Red Nails

Ken Kelly — color insert from The Hour of the Dragon

Ken Kelly — color insert from The People of the Black Circle

Ken Kelly — Hornetroid toy package art

Ken Kelly — Terraphant toy package art

Malcolm Smith — Cover art from Imagination Science Fiction (June, 1956)

Martin Schongauer — The Temptation of Saint Anthony

Max Ernst — The Eye of Silence

Peter Paul Rubens — The Fall of the Damned

Pierre_Jacques_Volaire — Eruption of Mt Vesuvius

Pieter Brueghel the Elder — The Triumph of Death

Thomas Cole — "Desolation", from The Course of Empire series

Thomas Cole — "Manhood", from The Voyage of Life series

Thomas Cole — "The Consummation of Empire", from The Course of Empire series

Thomas Daniell — "Part of the Kanaree Caves, Salsette" from Antiquities of India

Thomas Hawkins — front piece from The Book of the Great Sea Dragons

Tim Hildebrandt — "The Demon's Swamp", from the Realms of Wonder calendar

Tim Hildebrandt — "The Firepit", from the Realms of Wonder calendar

Tim Hildebrandt — poster art from The Deadly Spawn

Headers

Albert Kallis — poster art from Attack of the Crab Monsters

Albert Kallis — poster art from How to Make a Monster

Albert Kallis — poster art from Invasion of the Saucer-Men

Albert Kallis — poster art from Journey to the Seventh Planet

Albert Kallis — poster art from The Angry Red Planet

Bob Larkin — poster art from Humanoids from the Deep

Christos Achilleos — cover art from Rebel Worlds

Gray Morrow — cover art from Thongor of Lemuria

Joseph Musso — poster art from Laserblast

Joseph Smith — poster art from Phantasm

Ken Barr — cover art from Frankenstein comic

Matt Fox — cover art from Weird Tales

Peter Elson — cover art from Fantastic Planet

Reynold Brown — poster art from Tarantula

Reynold Brown — poster art from The Time Machine

Reynold Brown — poster art from World without End

Tim White — cover art from The Courts of Chaos

Tim White — cover art from The Trail of Cthulhu

Vic Fair — poster art from Vampire Circus