Mexicolore's Aztec pages grew from decades of school workshops into a large independent educational reference on the Mexica, Nahuatl language, archaeology, artefacts, daily life, religion, and the Spanish invasion.
James Grout's Encyclopaedia Romana has been online since April 1997, using densely linked essays to wander through Roman history, architecture, religion, food, Britain, Greece, Byzantium, and whatever historical side road proved interesting enough to follow.
NiagaraFrontier.com preserves a detailed chronology of the 1969 dewatering of the American Falls, when engineers diverted the river, built a cofferdam, studied the rock face, recovered debris and bodies, and let visitors walk onto the exposed riverbed.
MythNET began as a 1997 Ontario student classics project and still preserves pages on Olympian gods, major heroes, genealogical charts, myths, folklore, Roman life, and Latin vocabulary inside the larger Classics Unveiled site.
The International Photographic Historical Organization's website, launched in 1997, combines camera history, collector guidance, appraisal help, articles, timelines, and preservation resources.
The Central Pacific Railroad Photographic History Museum, online since 1999, preserves thousands of restored railroad photographs, stereoviews, maps, documents, timelines, and primary-source material about the first transcontinental railroad.
Paul Freeman's Abandoned & Little-Known Airfields has been documenting vanished airports since 1999 and now contains thousands of entries assembled from maps, aerial photographs, directories, memories, and contributed research.
Don Hitchcock's Don's Maps has grown into a huge independent archaeology reference covering Paleolithic sites, cave art, tools, figurines, human evolution, ancient cultures, maps, translations, and photographs assembled through years of patient personal research.
Lara Eakins' TudorHistory.org grew into a broad independent reference covering monarchs, Henry VIII's wives, biographies, chronologies, primary documents, maps, genealogy, Q&A, and years of hobbyist historical research.
Chairlift.org became a preservation site for vanished gondolas, doubles, T-bars, manufacturers, terminals, towers, and other ski-lift hardware that resorts steadily replaced and removed.
Rulers.org is a dense hand-maintained chronology of heads of state, heads of government, ministers, territories, subdivisions, and political events, with monthly records extending from 1996 into the present.
MedievalWarfare.info is an old-school specialist reference site linking battles, castles, sieges, armour, logistics, crusades, military organization, re-enactment, and source material into one dense hand-built web of medieval history.
The History Place's Dorothea Lange gallery pairs 42 prewar Farm Security Administration photographs of migrant families with their original captions instead of reducing the Depression to one famous image.
Donald R. Hensley Jr.'s Tap Lines has spent decades preserving Southeastern railroad history, photographs, short-line research, industrial railways, and digitized reference material.
Jerry A. Sierra's HistoryofCuba.com grew into a huge independently maintained Cuban-history reference, including a detailed page on the 1873 Virginius Affair.
An old JapanHemp page points back to Dave Olson's 1997 research on hemp in Japanese history, religion, agriculture, language, crafts, and law—material that has continued to be cited long after the original site became unreliable.
CroatianHistory.net is a dense independent portal covering Croatian history, culture, science, language, art, inventions, biographies, regional questions, and source material across hundreds of linked pages.
Douglas Harper's 2003 Slavery in the North website assembled state-by-state material on slavery outside the American South and became a widely cited independent reference despite the limits of one-person web scholarship.
Jamie Allen's FabPedigree is a gigantic hand-linked genealogy project containing nearly 297,000 pedigree pages, ancient-lineage claims, alternate pedigrees, errata, famous names, and an unusually frank warning not to treat any of it as authoritative.
Tracy Marks built a Queen Christina of Sweden site for the Ancient Sites community in the late 1990s, then moved it when that community folded in 2001. The result is a surviving example of early subject-focused personal scholarship.