Ink drawings by Ben Tolman: Huge, intricate, somewhat NSFW. There may be an issue with the side frame not scrolling in Firefox; if this is the case, click here, here, here, and here to see the galleries.
Illustrations by Reilly Stroope. (Flash interface.)
The Narrow Gauge Circle hosts, among other fine features, the Ted Kierscey Collection -- page after page after page of historical photographs of Colorado's railroad and mining towns.
Igor Sergeev has been collecting full, unopened cigarette packs from all over the world since 1976. His site now features over 21,000 photos, arranged in alphabetical order by brand name. Some are fascinating simply for the way they differ from what we're used to seeing at the 7-11; others are straight-up nine kinds of awesome.
Not safe for work: Baby Art: the profoundly fucked-up artwork of one Trevor Brown, a fabulously unwell individual.
The winners of the 2005 Nikon Small World Competition are up (previous years going back to 1977 are also worth a look). Photomicrography produces some amazing imagery, giving us glimpses into both the inner workings of living things, and the intricate structure of nonliving things (just click "find all").
Zdzislaw Beksinski (warning: music) produced some hauntingly beautiful, disturbing works of art: many, many paintings, as well as photographs, drawings, and digital creations. Sadly, he was killed earlier this year.