We think the following Wikipedia pages are pretty good. This is a selected list--since there are thousands of pages on Wikipedia, we couldn't possibly keep track of all the brilliant prose here! But if you come across a particularly impressive page, why not add it to the list as your way of saying "Thanks, good job"?
Be aware that you are most likely not the best judge of your own work. Even if you think a page you have contributed a large majority of the content to is brilliant, it is best that you wait for somebody else to recognise it as such.
If you want to know the secrets about writing brilliant prose, read how to write a great article.
Philosophy, Mathematics, and Natural Science
Alchemy -- Astronomy and astrophysics -- Biology -- Carbon -- Cladistics -- Comet -- Computational complexity theory (and related pages) -- Diamond -- DNA -- Earth -- Game theory -- Geologic ages (and related pages) -- Global warming -- LSD -- Ordinal -- Paleontology -- Paradox (and related pages) -- Periodic table -- Platypus -- Protista (and related pages) -- Pythagorean theorem -- Quantum mechanics -- Statistics (and related pages)
Social Sciences
Economics -- Economics -- Euro -- market form (and related pages) -- prisoners dilemma
History -- Battle of Jutland -- Behistun Inscription -- Byzantine Empire -- Chinese history -- East Germany -- History of Egypt -- History of England -- History of Germany -- History of Levant -- History of Scotland -- History of science and technology -- History of the Netherlands -- History of the United States -- Nagasaki -- Peloponnesian War -- September 11, 2001 Terrorist Attack -- Treblinka extermination camp -- World War I
Language -- British English -- Hebrew language -- Japanese language -- Sapir-Whorf hypothesis
Law -- copyright -- negligence -- Terrorism
Politics -- Prime Minister of Australia -- Propaganda -- Voting system
Sociology -- Disabilities/Disability Etiquette -- Milgram experiment
Applied Arts and Sciences
Algorithm -- ASCII -- code -- Echelon -- fountain pen -- information theory -- knot -- markup language -- nuclear weapon -- road transport -- search engine -- secure computing -- telephone switch -- World Wide Web
Culture
Games -- Bridge -- Chess -- Chess strategy and tactics -- Go (board game) -- Poker -- Stone, Paper, Scissors
Film and TV -- film theory -- Paramount -- Star Trek
Music -- disco -- freestyle music -- Hammond Organ -- hip hop -- jazz -- musical instrument -- Pickup -- punk rock -- saxophone -- Simon and Garfunkel -- Talking Heads
Religion and beliefs
-- Catholicism
-- Christianity
-- Greek mythology (and related pages)
-- Norse mythology (category)
-- Protestantism
-- Scientology
-- Sons of Noah
-- The Book of Mormon
Sport -- baseball -- Summer Olympic Games
Other -- Anno Domini -- bulldogging -- calendar -- Freemasonry -- Gulliver's Travels -- Hebrew calendar -- horse-breaking -- horseshoe -- Nude celebrities on the Internet -- political correctness -- science fiction -- Sheepshead -- spacecraft propulsion
Biography
Mortimer Adler -- Achilles -- Alexander the Great -- Humphrey Bogart -- Paul Erdös -- Ernest Hemingway -- Jim Henson -- Alfred Hitchcock -- Homer -- Ibn Battuta -- Stephen King -- Rudyard Kipling -- Leonardo da Vinci -- Lamarck -- Wolfgang Amadeus Mozart -- Joshua A. Norton -- Perseus -- Rembrandt van Rijn -- Eugene Wigner
Wikipedia
Wikipedia FAQ -- WikiProject U.S. States
Again, feel free to add to the list when you think an article deserves the mention!